Blockchain Developer Jobs
76 open positions found · Salary range: $12 - $188,135
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Blockchain Developer
Mundy Buddy Publishing LLC.Rockville, MD
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Lead Software Engineer - Blockchain Developer
JPMorganChaseJersey City, NJ, US
JOB DESCRIPTION Be an integral part of an agile team that's constantly pushing the envelope to enhance, build, and deliver top-notch technology products. As a Lead Software Engineer at JPMorgan Chase within Commercial and Investment Banking team, you will play a key role in an agile team dedicated to building, enhancing, and delivering trusted, market-leading technology products. You will leverage your deep technical expertise and problem-solving skills to address complex challenges across multiple technologies and applications, driving significant business impact through your contributions. Roles and Responsibilities Design Peer-to-peer distributed systems and implement using multiple technology stacks. Familiarity with key blockchain technologies \& understanding. Collaborate with various line of business technology teams to design and build robust and performant blockchain-based solutions. Design and implement blockchain supporting tools and utilities (e.g., CLI client, tools for exploring the blockchain, monitoring, benchmarking or debugging tools) Implement rigorous and thorough testing practices to ensure the security and performance goals of blockchain infrastructure. Implement rigorous and thorough monitoring and testing practices to ensure the security and performance goals of blockchain infrastructure Design and verify cryptographic protocols deployed on the blockchain Design blockchain solutions, such that it can support benchmark use-cases of decentralized applications, with proven and verified cryptographic protocols Build out monitoring protocols and fail-over measures. Collaborate with development teams to develop integration design and where appropriate prepare estimates on design and development services for integration initiatives Required Skills Formal training or certification in software engineering concepts and 5+ years of applied experience Hands-on knowledge of end-2-end development in web3 ecosystem – such as smart contract development, deployment, interaction with RPC providers, integrating with key management systems. Strong familiarity with different layers, such as Ethereum, Layer2 protocols Strong object-oriented programming language background in one or more of the following languages: Go, C++, Rust, Java, JavaScript Experience in Developing and Designing large and complex distributed computing environments Proven track record of delivering software development projects Experience with cloud infrastructure services AWS and Kubernetes. Familiarity with using Git or other version control software for source code management Desired Skills Financial industry experience Thorough understanding of cryptographic protocols and blockchain implementations Good understanding in key management, custody solutions and cryptographic fundamentals Awareness of inter-operability solutions. Strong analytical and problem-solving skills Self-starter that requires minimal supervision Flexible / adaptable - able to work with diverse groups of people including all levels of business management Excellent project management and facilitation skills ABOUT US JPMorganChase, one of the oldest financial institutions, offers innovative financial solutions to millions of consumers, small businesses and many of the world’s most prominent corporate, institutional and government clients under the J.P. Morgan and Chase brands. Our history spans over 200 years and today we are a leader in investment banking, consumer and small business banking, commercial banking, financial transaction processing and asset management. We offer a competitive total rewards package including base salary determined based on the role, experience, skill set and location. Those in eligible roles may receive commission-based pay and/or discretionary incentive compensation, paid in the form of cash and/or forfeitable equity, awarded in recognition of individual achievements and contributions. We also offer a range of benefits and programs to meet employee needs, based on eligibility. These benefits include comprehensive health care coverage, on-site health and wellness centers, a retirement savings plan, backup childcare, tuition reimbursement, mental health support, financial coaching and more. Additional details about total compensation and benefits will be provided during the hiring process. We recognize that our people are our strength and the diverse talents they bring to our global workforce are directly linked to our success. We are an equal opportunity employer and place a high value on diversity and inclusion at our company. We do not discriminate on the basis of any protected attribute, including race, religion, color, national origin, gender, sexual orientation, gender identity, gender expression, age, marital or veteran status, pregnancy or disability, or any other basis protected under applicable law. We also make reasonable accommodations for applicants’ and employees’ religious practices and beliefs, as well as mental health or physical disability needs. Visit our FAQs for more information about requesting an accommodation. JPMorgan Chase \& Co. is an Equal Opportunity Employer, including Disability/Veterans ABOUT THE TEAM J.P. Morgan’s Commercial \& Investment Bank is a global leader across banking, markets, securities services and payments. Corporations, governments and institutions throughout the world entrust us with their business in more than 100 countries. The Commercial \& Investment Bank provides strategic advice, raises capital, manages risk and extends liquidity in markets around the world.
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Blockchain Developer
From $900,000/yr
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Blockchain Developer
Mundy Buddy Publishing LLC.Rockville, MD
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Lead Software Engineer - Blockchain Developer
JPMorganChaseJersey City, NJ, US
JOB DESCRIPTION Be an integral part of an agile team that's constantly pushing the envelope to enhance, build, and deliver top-notch technology products. As a Lead Software Engineer at JPMorgan Chase within Commercial and Investment Banking team, you will play a key role in an agile team dedicated to building, enhancing, and delivering trusted, market-leading technology products. You will leverage your deep technical expertise and problem-solving skills to address complex challenges across multiple technologies and applications, driving significant business impact through your contributions. Roles and Responsibilities Design Peer-to-peer distributed systems and implement using multiple technology stacks. Familiarity with key blockchain technologies \& understanding. Collaborate with various line of business technology teams to design and build robust and performant blockchain-based solutions. Design and implement blockchain supporting tools and utilities (e.g., CLI client, tools for exploring the blockchain, monitoring, benchmarking or debugging tools) Implement rigorous and thorough testing practices to ensure the security and performance goals of blockchain infrastructure. Implement rigorous and thorough monitoring and testing practices to ensure the security and performance goals of blockchain infrastructure Design and verify cryptographic protocols deployed on the blockchain Design blockchain solutions, such that it can support benchmark use-cases of decentralized applications, with proven and verified cryptographic protocols Build out monitoring protocols and fail-over measures. Collaborate with development teams to develop integration design and where appropriate prepare estimates on design and development services for integration initiatives Required Skills Formal training or certification in software engineering concepts and 5+ years of applied experience Hands-on knowledge of end-2-end development in web3 ecosystem – such as smart contract development, deployment, interaction with RPC providers, integrating with key management systems. Strong familiarity with different layers, such as Ethereum, Layer2 protocols Strong object-oriented programming language background in one or more of the following languages: Go, C++, Rust, Java, JavaScript Experience in Developing and Designing large and complex distributed computing environments Proven track record of delivering software development projects Experience with cloud infrastructure services AWS and Kubernetes. Familiarity with using Git or other version control software for source code management Desired Skills Financial industry experience Thorough understanding of cryptographic protocols and blockchain implementations Good understanding in key management, custody solutions and cryptographic fundamentals Awareness of inter-operability solutions. Strong analytical and problem-solving skills Self-starter that requires minimal supervision Flexible / adaptable - able to work with diverse groups of people including all levels of business management Excellent project management and facilitation skills ABOUT US JPMorganChase, one of the oldest financial institutions, offers innovative financial solutions to millions of consumers, small businesses and many of the world’s most prominent corporate, institutional and government clients under the J.P. Morgan and Chase brands. Our history spans over 200 years and today we are a leader in investment banking, consumer and small business banking, commercial banking, financial transaction processing and asset management. We offer a competitive total rewards package including base salary determined based on the role, experience, skill set and location. Those in eligible roles may receive commission-based pay and/or discretionary incentive compensation, paid in the form of cash and/or forfeitable equity, awarded in recognition of individual achievements and contributions. We also offer a range of benefits and programs to meet employee needs, based on eligibility. These benefits include comprehensive health care coverage, on-site health and wellness centers, a retirement savings plan, backup childcare, tuition reimbursement, mental health support, financial coaching and more. Additional details about total compensation and benefits will be provided during the hiring process. We recognize that our people are our strength and the diverse talents they bring to our global workforce are directly linked to our success. We are an equal opportunity employer and place a high value on diversity and inclusion at our company. We do not discriminate on the basis of any protected attribute, including race, religion, color, national origin, gender, sexual orientation, gender identity, gender expression, age, marital or veteran status, pregnancy or disability, or any other basis protected under applicable law. We also make reasonable accommodations for applicants’ and employees’ religious practices and beliefs, as well as mental health or physical disability needs. Visit our FAQs for more information about requesting an accommodation. JPMorgan Chase \& Co. is an Equal Opportunity Employer, including Disability/Veterans ABOUT THE TEAM J.P. Morgan’s Commercial \& Investment Bank is a global leader across banking, markets, securities services and payments. Corporations, governments and institutions throughout the world entrust us with their business in more than 100 countries. The Commercial \& Investment Bank provides strategic advice, raises capital, manages risk and extends liquidity in markets around the world.
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Blockchain Developer
From $900,000/yr
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Lead Software Engineer - Blockchain Developer
JPMorganChaseJersey City, NJ, US
JOB DESCRIPTION Be an integral part of an agile team that's constantly pushing the envelope to enhance, build, and deliver top-notch technology products. As a Lead Software Engineer at JPMorgan Chase within Commercial and Investment Banking team, you will play a key role in an agile team dedicated to building, enhancing, and delivering trusted, market-leading technology products. You will leverage your deep technical expertise and problem-solving skills to address complex challenges across multiple technologies and applications, driving significant business impact through your contributions. Roles and Responsibilities Design Peer-to-peer distributed systems and implement using multiple technology stacks. Familiarity with key blockchain technologies \& understanding. Collaborate with various line of business technology teams to design and build robust and performant blockchain-based solutions. Design and implement blockchain supporting tools and utilities (e.g., CLI client, tools for exploring the blockchain, monitoring, benchmarking or debugging tools) Implement rigorous and thorough testing practices to ensure the security and performance goals of blockchain infrastructure. Implement rigorous and thorough monitoring and testing practices to ensure the security and performance goals of blockchain infrastructure Design and verify cryptographic protocols deployed on the blockchain Design blockchain solutions, such that it can support benchmark use-cases of decentralized applications, with proven and verified cryptographic protocols Build out monitoring protocols and fail-over measures. Collaborate with development teams to develop integration design and where appropriate prepare estimates on design and development services for integration initiatives Required Skills Formal training or certification in software engineering concepts and 5+ years of applied experience Hands-on knowledge of end-2-end development in web3 ecosystem – such as smart contract development, deployment, interaction with RPC providers, integrating with key management systems. Strong familiarity with different layers, such as Ethereum, Layer2 protocols Strong object-oriented programming language background in one or more of the following languages: Go, C++, Rust, Java, JavaScript Experience in Developing and Designing large and complex distributed computing environments Proven track record of delivering software development projects Experience with cloud infrastructure services AWS and Kubernetes. Familiarity with using Git or other version control software for source code management Desired Skills Financial industry experience Thorough understanding of cryptographic protocols and blockchain implementations Good understanding in key management, custody solutions and cryptographic fundamentals Awareness of inter-operability solutions. Strong analytical and problem-solving skills Self-starter that requires minimal supervision Flexible / adaptable - able to work with diverse groups of people including all levels of business management Excellent project management and facilitation skills ABOUT US JPMorganChase, one of the oldest financial institutions, offers innovative financial solutions to millions of consumers, small businesses and many of the world’s most prominent corporate, institutional and government clients under the J.P. Morgan and Chase brands. Our history spans over 200 years and today we are a leader in investment banking, consumer and small business banking, commercial banking, financial transaction processing and asset management. We offer a competitive total rewards package including base salary determined based on the role, experience, skill set and location. Those in eligible roles may receive commission-based pay and/or discretionary incentive compensation, paid in the form of cash and/or forfeitable equity, awarded in recognition of individual achievements and contributions. We also offer a range of benefits and programs to meet employee needs, based on eligibility. These benefits include comprehensive health care coverage, on-site health and wellness centers, a retirement savings plan, backup childcare, tuition reimbursement, mental health support, financial coaching and more. Additional details about total compensation and benefits will be provided during the hiring process. We recognize that our people are our strength and the diverse talents they bring to our global workforce are directly linked to our success. We are an equal opportunity employer and place a high value on diversity and inclusion at our company. We do not discriminate on the basis of any protected attribute, including race, religion, color, national origin, gender, sexual orientation, gender identity, gender expression, age, marital or veteran status, pregnancy or disability, or any other basis protected under applicable law. We also make reasonable accommodations for applicants’ and employees’ religious practices and beliefs, as well as mental health or physical disability needs. Visit our FAQs for more information about requesting an accommodation. JPMorgan Chase \& Co. is an Equal Opportunity Employer, including Disability/Veterans ABOUT THE TEAM J.P. Morgan’s Commercial \& Investment Bank is a global leader across banking, markets, securities services and payments. Corporations, governments and institutions throughout the world entrust us with their business in more than 100 countries. The Commercial \& Investment Bank provides strategic advice, raises capital, manages risk and extends liquidity in markets around the world.
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Blockchain Developer
Mundy Buddy Publishing LLC.Rockville, MD
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Blockchain Developer
From $900,000/yr
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Blockchain Developer
Join the Team at The Digi Chain Exchange ============================================ Are you passionate about cryptocurrency, blockchain technology, and digital finance? The Digi Chain Exchange offers exciting career opportunities for talented and motivated individuals like you. Why Work with Us? * Innovative Culture: Work on cutting-edge projects shaping the future of digital finance. * Professional Growth: We offer training programs and opportunities for advancement to support your career goals. * Collaborative Environment: Join a team of experts and work alongside talented individuals passionate about crypto. * Impactful Work: Your contributions will directly impact our audience and the broader crypto community. * Flexible Work Arrangements: We offer flexible schedules, including remote work options. Blockchain Developer Develop and maintain blockchain applications. Collaborate with the development team to build secure solutions. Qualifications: Degree in Computer Science. Proficiency in Solidity, JavaScript, and Python. How to Apply If you're interested in any of these positions, send your resume and a cover letter to webmaster@thedigichainexchange.com. Please mention the position you're applying for and why you think you'd be a great fit for our team. Internship Opportunities We also offer internships for students and recent graduates eager to gain hands-on experience in the cryptocurrency industry. To apply, send your resume and a cover letter to webmaster@thedigichainexchange.com, specifying your area of interest. Join Us Today If you're excited about the future of cryptocurrency and want to be part of a leading platform in the industry, we would love to hear from you.
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Blockchain Developer (DeFi and Cryptography)
From $12/yr
Blockchain Developer (DeFi and Cryptography) Duration: 12 Months Contract NC (Remote) Job Description We are seeking a highly skilled Blockchain Developer to join our core engineering team. In this role, you will be responsible for designing, developing, and deploying secure, high-performance decentralized finance (DeFi) protocols. You will bridge the gap between complex financial logic and low-level blockchain implementation, ensuring that our systems are not only innovative but also mathematically sound and resilient to attacks. As a specialist in DeFi and Cryptography, you will take ownership of the full development lifecycle—from whitepaper logic and architectural design to mainnet deployment and post-launch optimization. Key Responsibilities: - Smart Contract Engineering: Design and implement robust smart contracts for DeFi primitives such as automated market makers (AMMs), lending pools, and cross-chain bridges. - Protocol Security: Apply advanced cryptographic principles (e.g., digital signatures, hashing, zero- knowledge proofs) to ensure data integrity and user privacy. - System Architecture: Design scalable back-end architectures that interface seamlessly with Ethereum, Layer 2 solutions, or Rust-based chains. - DeFi Innovation: Research and implement cutting-edge DeFi mechanisms including flash loans, yield farming strategies, and algorithmic stablecoin logic. - Audit \& Quality Assurance: Conduct rigorous unit testing, integration testing, and formal verification to eliminate vulnerabilities before deployment. - Collaboration: Work closely with front-end engineers to integrate Web3 providers and with UI/UX designers to create seamless decentralized experiences. Preferred Qualifications: - Experience with Layer 2 scaling solutions (Optimism, Arbitrum, ZK-Rollups). - Familiarity with formal verification tools and smart contract auditing processes. - Contributions to open-source Web3 projects or active participation in the DeFi research community. - Understanding of financial modeling and quantitative analysis. Mandatory Skills : - Blockchain Developer with DeFi and Cryptography experience: Proven track record of shipping production-grade decentralized applications. - Multilingual Programming: Professional proficiency in Solidity and Rust, complemented by strong JavaScript/TypeScript or Python for tooling and testing. - Core Architecture: Deep understanding of blockchain internals, including consensus mechanisms (PoS, PoW), state machines, and gas optimization techniques. - DeFi Domain Expertise: Comprehensive experience with DEXs, liquidity provisioning, staking, derivatives, payments, lending, and complex tokenomics/token systems. - Cryptography Fundamentals: Solid grasp of symmetric/asymmetric encryption, elliptic curve cryptography (ECC), and secure key management. - Debugging \& Testing: Expert ability to test, simulate, and fix complex bugs in distributed environments using frameworks like Hardhat, Foundry, or Anchor.
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Senior Blockchain Security Developer (Canton)
From $35/yr
About Us OpenZeppelin is the security standard onchain finance is built on. Founded in 2015, our mission is to accelerate the world's transition to an open financial system, built on open standards and secured by rigorous research. Our open-source Contract Libraries have facilitated over $35 trillion in onchain value and are used by 10 of the top 10 tokenized money market funds and 9 of the top 10 stablecoins by market cap. We combine AI-native security tooling with deep research and a decade of audit expertise to support leading institutions and crypto-native teams shaping the next generation of digital assets like DTCC, Fidelity, Coinbase, Uniswap, Aave, the Ethereum Foundation, and many more across the full secure development lifecycle. Please note: Always refer to OpenZeppelin's official job page for the most accurate information about our open roles, as we have seen multiple third party job sites posting inaccurate information. The Secure Development team ❤️ OpenZeppelin is the security partner of choice for the most important protocols in Web3. Our Secure Development team sits at the intersection of building and breaking: we design, implement, and harden production-grade libraries and smart contracts for leading projects across EVM, Starknet, Stellar/Soroban, Arbitrum Stylus, Aptos, and beyond, often as an embedded extension of the client's engineering team. We work the way the rest of the industry will five years from now. Every developer on the team is a fully AI-native engineer, supported by outstanding internal AI tooling built for every phase of secure development. Developers own their workstreams end-to-end — agents amplify their effectiveness, and peers, security researchers, and external auditors provide rigorous review on every piece of work that ships. The Canton Network engagement This role joins us at the start of a 24-month, multi-million-dollar commitment to build the open-source DeFi foundations of the world's most institutional blockchain, approved by the Canton Foundation. The scope: * 8 production-ready Reference Implementations. Privacy-preserving DEX, lending protocol, cross-chain stablecoin settlement, confidential auction launchpad, and four more defined in year two. End-to-end blueprints that other teams will fork. * The OpenZeppelin Contracts Library for Daml. The audited foundation Canton developers will import — vaults, hooks, RBAC, credentials, modular multi-sig accounts, standardized messaging gateway, DeFi math, staking, vesting, auctions, more. The same role our Solidity library plays today, on Canton. * Canton standards implementation. Audited Daml implementations of CIP-56 (Token Standard), CIP-86 (ERC-20 Compatible Interface), CIP-103 (dApp Standard), and CIP-104 (Traffic-Based App Rewards) — designed to interoperate cleanly with the broader Splice ecosystem and with ChainSafe's CIP-86 middleware. * 55 researcher-weeks of dedicated security capacity. Smart-contract audits, full-stack reviews, pen tests — amplified by OpenZeppelin's AI security agent in the workflow. Every release ships with a published audit report. * AI-native developer experience for a new ecosystem. Contracts Wizard, UI Builder, MCP Server, Claude Plugin, AI Skills — all built for Canton, all AI-native end-to-end. You'll help define how AI-native engineering looks on a non-EVM stack. You'll work alongside Digital Asset, the Canton Foundation, and ChainSafe. The deliverables become the standard others build on. The work is public; the impact is measurable; the partners are the institutions reshaping how capital moves. Canton is your first focus, but you'll keep contributing across the broader Secure Development portfolio as the work demands. Within this, you will: * Own the development of the OpenZeppelin Contracts Library for Daml end-to-end: vaults, hooks, RBAC, credentials, messaging gateway, accounts, and more. The audited primitives Canton developers will import. * Lead the technical design and implementation of the year-1 Reference Implementations: privacy-preserving DEX, lending protocol, cross-chain stablecoin settlement, and confidential auction launchpad. * Implement and shepherd the OZ Daml versions of CIP-56, CIP-86, CIP-103, and CIP-104. Coordinate with Digital Asset on spec evolution and with ChainSafe on middleware alignment. * Run client-facing roadmap, design, and milestone discussions with Digital Asset, the Canton Foundation, and ChainSafe. * Collaborate with OpenZeppelin's auditors and security researchers on threat models, audit prep, and full-stack reviews for every Reference Implementation. * Use AI systems as core daily tools. Extend them: build agents, skills, and workflows that compound the team's leverage on the Canton engagement and beyond. * Apply AI directly to security work and share what works back to the team: audit assistance, invariant generation, spec analysis, fuzzing harnesses, custom evals * Contribute developer-experience and security feedback upstream into the Canton protocol, Splice, the Daml SDK, and the Splice Wallet Kernel. * Conduct open-ended research around privacy-preserving DeFi, multi-party authorization patterns, and Canton-specific primitives; you'll have time to publish and contribute back to OpenZeppelin's body of knowledge. Location OpenZeppelin is a fully remote organization, however candidates for this position must be located within UTC-8 to UTC+3 time zones to be considered. You have * Production Daml fluency. You have shipped non-trivial Daml in production. You understand templates, choices, controllers/observers/signatories, multi-party authorization, sub-transaction views, and propose/accept patterns as first-class primitives. Running an SV, contributing to Splice internals, governance, or Canton Coin tokenomics. * 3+ years of experience in UTXO-based protocol development. You can reason about Canton's privacy boundaries the way an EVM developer reasons about storage slots. Prior production work in a privacy-preserving or UTXO-based architecture (Canton, Cardano, Midnight, Zcash, Aleo, Mina, or similar) is expected. * 3+ years of experience on DeFi engineering in production. you have shipped non-trivial DeFi primitives in production: AMMs, vaults (ERC-4626 or equivalent), lending protocols, cross-chain settlement. You understand the security pitfalls of each. * A security-first mindset. this is non-negotiable. You think adversarially about every line of code you write, and you have demonstrable experience either auditing, breaking, or hardening production systems — published threat models, audit reports, responsible disclosures, or equivalent output. * Library / SDK API design taste. You've built reusable, import-first developer libraries, not just applications. You have opinions on extensibility patterns (hooks, modular components, override points) and on what makes an audited primitive pleasant to consume. * Cross-chain interoperability exposure. Production work with at least one major cross-chain messaging protocol (Chainlink CCIP, LayerZero, Wormhole, Axelar, or similar). * Institutional / compliance design fluency: You can design with credential gates, multi-party attestation, custody flows, and compliance hooks as native constraints. * An AI-native workflow. Claude Code, Cursor, or equivalent is your daily driver. You have measurable productivity gains to show for it and clear opinions on how to use these tools well. You have shipped at least one non-trivial AI-powered tool, agent, or automation pipeline in production using the Anthropic SDK, MCP, custom evals, or comparable. * Experience applying AI to security work: You've already used AI as a serious instrument in security workflows: audit assistance, vulnerability research, fuzzing, invariant or spec analysis, static-analysis augmentation, or similar. * Fluency in client-facing communication (English). * Autonomy and proactivity. Nice to have * Cryptography or financial-engineering background. Privacy-preserving DeFi rewards both. * Institutional finance background. Capital-markets microstructure, custody, compliance flows, RWA tokenization, settlement. * Hands-on experience with non-EVM ecosystems. Starknet, Stellar/Soroban, Arbitrum Stylus, Aptos, Move-based chains. * Open-source contributions to widely-used libraries in the smart-contract or AI-tooling space. Logistics Our interview process is designed to be fast (we target ~30 days from first call to offer) while still giving both sides a clear "yes." The full process consists of: * Recruiter interview (30-45 minutes) * Manager interview (60 minutes) * Peer interview (45 minutes) * Paid technical work trial Please let us know if you require any accommodations for the interview process, and we’ll do our best to provide assistance. Benefits * Company in-person gatherings in different locations around the world 😎 * Fully remote work 🌎 * Flexible time off 🏝 * Paid parental leave 💙 * One time work-from-home equipment stipend of up to $500 USD 🪑 * Medical insurance coverage 🏥 * Learning \& Development opportunities 🧠 * Work with a global team in a fast-growing industry 🚀 At OpenZeppelin , we are an equal opportunity employer and we value different perspectives. We are committed to building a diverse workforce. This includes but is not limited to gender, race, sexual orientation, religion, national origin and other characteristics that make each one of us unique. In this uniqueness, we find the most value. Come join us! Use of AI as part of the recruiting process As part of OpenZeppelin’s recruitment process, we may use automated tools, including artificial intelligence, to assist in reviewing applications and assessing candidate qualifications. These tools are used to support our People team by identifying relevant skills and experience, and are not used to make decisions solely by automated means. All hiring decisions involve human review. Any personal data provided as part of your application will be processed in accordance with OpenZeppelin’s Data Privacy Notice. If you have questions about this recruitment process or would like to request human review of your application, please contact us at talent@openzeppelin.com.
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Lead Blockchain Developer Role
. Executive Summary Viral Vind Technologies is seeking an elite Senior Blockchain Protocol Engineer to lead the development of Phantom Proto. This is a high-stakes, onsite role in Karachi for an engineer who excels in low-level systems programming and cryptographic implementation. You will be responsible for building the privacy-preserving infrastructure that allows our autonomous AI systems to operate with absolute data integrity. 2. Core Responsibilities * Protocol Engineering: Architect and optimize a high-performance blockchain protocol from the ground up using Rust. * Cryptographic Implementation: Integrate Fully Homomorphic Encryption (FHE) and Zero-Knowledge Proofs (ZKP) into the core execution layer to ensure "Stealth-by-Default" transactions. * Security \& Auditing: Write adversarial-grade code. You are responsible for the protocol's resistance against Sybil attacks, front-running, and cryptographic exploits. * Infrastructure Design: Manage the consensus mechanism and data availability layers, ensuring sub-second finality and high throughput. * Onsite Collaboration: Work directly with the CEO and AI engineering teams to bridge the gap between autonomous agentic workflows and on-chain execution. 3. Required Technical Qualifications * Rust Mastery: Minimum 3+ years of professional experience in Rust (or 5+ years in C++) with a focus on memory safety, concurrency, and performance tuning. * Cryptography: Deep understanding of cryptographic primitives, including Elliptic Curve Cryptography (ECC), AES, and SHA-3. * Advanced Tech: Proven ability to implement or optimize ZKP (zk-SNARKs/STARKs) or Multi-Party Computation (MPC). * Systems Design: Experience with distributed systems, p2p networking (libp2p), and consensus algorithms (BFT/PoS). * Environment: Comfortable working in a Linux-heavy, high-security onsite "War Room" environment. 4. Professional Attributes * Zero-Guidance Operator: You don't need a manager to tell you how to solve a bottleneck. You find the solution and implement it. * High-Pressure Reliability: Ability to maintain code quality and mental clarity during critical deployment phases. * Intellectual Dominance: A track record of solving complex mathematical or engineering problems that others deemed "too difficult." 5. Compensation \& Benefits * Salary: Market-leading PKR salary (benchmarked against global remote standards). * Equity: Founding-member token allocation in the Phantom Proto ecosystem. * Growth: Work on the most advanced FHE project in the region. Job Type: Full-time Work Location: In person
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Blockchain Developer
From $900,000/yr
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Java-Blockchain Developer- Dallas, TX
$45,000 - $159,000/yr
We are seeking a skilled Java Developer with domain Knowledge on blockchain technologies(Digital Crypto) to join our dynamic team. You’ll be responsible for designing, developing, and maintaining high-performance applications that integrate with decentralized systems and smart contracts. Responsibilities Develop and maintain Java-based backend systems for blockchain-integrated applications. Design and implement smart contracts and decentralized applications (DApps). Collaborate with cross-functional teams to define, design, and ship new features. Optimize application performance and scalability. Ensure security and data integrity in blockchain interactions. Stay updated with emerging trends in blockchain and distributed ledger technologies. Requirements Strong proficiency in Java (Spring Boot, Hibernate, etc.). Experience with blockchain platforms such as Ethereum, Hyperledger, or Solana. Familiarity with smart contract development (Solidity, Web3.js). Understanding of cryptographic principles and consensus algorithms. Experience with RESTful APIs and microservices architecture. Knowledge of Docker, Kubernetes, and CI/CD pipelines is a plus. Bachelor’s degree in Computer Science or related field. Preferred Skills Experience with Node.js or Python for blockchain scripting. Familiarity with cloud platforms (AWS, Azure, GCP). Contributions to open source blockchain projects. Strong problem-solving and analytical skills. Compensation, Benefits and Duration Minimum Compensation: USD 45,000 Maximum Compensation: USD 159,000 Compensation is based on actual experience and qualifications of the candidate. The above is a reasonable and a good faith estimate for the role. Medical, vision, and dental benefits, 401k retirement plan, variable pay/incentives, paid time off, and paid holidays are available for full time employees. This position is not available for independent contractors No applications will be considered if received more than 120 days after the date of this post
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Blockchain Developer
From $90,000/yr
Skills DLT Blockchains Summary Title : BlockChain Developer Location: Northern VA Overview We are seeking an experienced Blockchain Developer to design, develop, and optimize distributed ledger solutions for enterprise-grade applications. The role involves working across smart contracts, consensus mechanisms, secure integrations, and high-throughput architectures tailored for financial and workflow-driven systems. Responsibilities: - Design, develop \& test software using Smart contracts, Typescripts, Solidity, JSON, REST APIs - Implement Security Measures by applying cryptographic techniques to protect digital transaction data and prevent unauthorized access. - Research, develop, and implement various blockchain protocols and consensus algorithms. - Experience with both EVM and Non-EVM chain, privacy infrastructure. - Document Development Processes, maintain clear documentation of the development lifecycle, including system architecture and technical specifications. - Stay Updated, keep abreast of the latest trends and advancements in blockchain technology to ensure the solution evolves. - Support setup of test environment, write test drivers. Provide support to test environments, QA and Production as necessary. - Hands on experience with AWS deployment. Skills AWS Deployment CI/CD Containerization DLT Blockchains DLT Smart Contracts JAVA Python Solidity Typescript Pay: $90,000.00 - $95,000.00 per year Benefits: * 401(k) * Health insurance Work Location: In person
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Blockchain Developer- Dallas, TX
$45,000 - $159,000/yr
Role SummaryWe are seeking a highly skilled and experienced Blockchain Developer to design, develop, and deploy secure, efficient, and scalable decentralized applications (DApps) and smart contracts. This role is crucial for building and maintaining our digital asset infrastructure, requiring deep expertise in major smart contract platforms and a strong focus on the entire digital asset lifecycle. Key Roles \& Responsibilities* Smart Contract Development: + Design, write, test, and deploy highly secure and optimized smart contracts using languages like Solidity, Rust, and Move . + Conduct rigorous unit testing, integration testing, and security audits for all smart contract code. * Platform Implementation: + Develop and integrate solutions specifically on platforms such as Ethereum , Solana , or other cutting-edge smart contract platforms. + Work with core blockchain architecture to ensure scalability, security, and performance. * Digital Asset Lifecycle Management: + Implement and manage the technical aspects of the digital asset lifecycle , including protocols for issuance , settlement , custody , and ongoing servicing . + Ensure compliance and integrity across all phases of the digital asset journey. * System Integration: + Collaborate with front-end and back-end development teams to integrate blockchain components (Web3.js/Ethers.js/Solana-web3) into full-stack decentralized applications. * Security \& Optimization: + Apply cryptographic principles and best practices to ensure the security and immutability of the network and smart contracts. + Actively research and propose new technologies and methodologies to optimize performance and cost. Preferred Qualifications* Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related field. * Experience with layer 2 scaling solutions (e.g., Polygon, Arbitrum) or cross-chain communication protocols. * Familiarity with decentralized storage solutions (e.g., IPFS) and oracles. Contributions to open-source blockchain projects. * Compensation, Benefits and Duration Minimum Compensation: USD 45,000 Maximum Compensation: USD 159,000 Compensation is based on actual experience and qualifications of the candidate. The above is a reasonable and a good faith estimate for the role. Medical, vision, and dental benefits, 401k retirement plan, variable pay/incentives, paid time off, and paid holidays are available for full time employees. This position is not available for independent contractors No applications will be considered if received more than 120 days after the date of this post
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Blockchain Developer
From $80,000/yr
Role Overview: As a Blockchain Developer, you will design, implement, and optimize smart contracts and blockchain-based solutions. You’ll collaborate with a team of engineers, designers, and product managers to bring decentralized applications to life and ensure their reliability, security, and scalability. Key Responsibilities: * Design and develop smart contracts on platforms such as Ethereum, Solana, Polygon, or Binance Smart Chain. * Build and maintain dApps (decentralized applications) and related backend services. * Integrate blockchain solutions with existing systems and APIs. * Conduct code reviews and ensure smart contract security best practices. * Collaborate with the team to design blockchain architecture, consensus mechanisms, and on-chain/off-chain interactions. * Stay current with emerging blockchain trends, frameworks, and technologies. Qualifications: Required: * 1-3 years of proven experience as a Blockchain Developer or similar role. * Strong proficiency in Solidity, Rust, Go, or JavaScript/TypeScript. * Hands-on experience with web3.js, ethers.js, or similar libraries. * Understanding of blockchain fundamentals (cryptography, consensus algorithms, tokens, etc.). * Experience deploying and testing smart contracts. * Familiarity with DeFi, NFTs, or Layer 2 solutions is a plus. Preferred: * Experience with Node.js, Python, or backend frameworks. * Familiarity with IPFS, The Graph, or Chainlink. * Experience working in Agile environments. * Contributions to open-source blockchain projects are highly valued. Job Type: Full-time Pay: Rs80,000.00 - Rs300,000.00 per month Work Location: In person
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Backend Developer (Blockchain)
From $100/yr
Work Type: Remote Rate: $100/hour (negotiable based on experience) Start Date: Immediate About the Role A client of ours is hiring a skilled Backend Developer (Blockchain) for a US-based client building a simple, affordable international payment application. This role requires strong backend engineering skills, experience with blockchain technologies, and a solid understanding of payment systems Key Responsibilities * Develop and maintain backend services for an international payment application * Implement blockchain-based transaction and payment logic * Build secure, scalable APIs to support frontend features * Ensure system security, performance, and scalability * Integrate third-party services and payment infrastructure where required * Test, debug, and support deployment of backend services Skills \& Experience * Proven experience as a Backend Developer / Blockchain Engineer * Strong proficiency in Node.js * Hands-on experience with blockchain technologies What We Offer * Competitive hourly compensation ($100/hour, based on experience) * Flexible working hours (20 hours per week) * Fully remote role * Opportunity to work with a US-based client on a high-impact fintech product Apply here https://jobs.droomwork.io/job/1836 Job Type: Part-time Pay: ₦140,000.00 per hour Expected hours: 6 – 8 per week
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Blockchain Developer
$113,963 - $137,246/yr
Position Title Blockchain Developer Location New York and California (hybrid) * Strong Blockchain development experience (hands-on) * Experience in building blockchain applications from scratch * Strong architecture and design experience in blockchain solutions * Experience working on Ledger systems * Preference for candidates who have worked on trading/fintech platforms similar to robinhood or coinbase or comparable financial software products Job Types: Full-time, Contract Pay: $113,963.67 - $137,246.56 per year Work Location: Hybrid remote in New York, NY 10040
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Blockchain Developer (Smart Contracts/Core Protocol)
From $20/yr
Blockchain Developer (Smart Contracts/Core Protocol) Location: Ho Chi Minh City, Vietnam About Us: We are building the next-generation stablecoin payroll infrastructure, leveraging blockchain technology to provide secure, efficient, and transparent payment solutions. Join our innovative team in Ho Chi Minh City to shape the future of finance. Job Summary: We are seeking a highly skilled and experienced Blockchain Developer to design, develop, and deploy smart contracts and core blockchain protocols for our stablecoin payroll platform. The ideal candidate will have a deep understanding of blockchain architecture, cryptography, and decentralized application (DApp) development. Key Responsibilities: * Design, develop, test, and deploy secure and efficient smart contracts on EVM-compatible chains (e.g., Ethereum, Binance Smart Chain) or other relevant blockchain platforms (e.g., Solana). * Implement and maintain core blockchain protocols and infrastructure components. * Conduct thorough code reviews and security audits of smart contracts. * Collaborate with backend and frontend teams to integrate blockchain functionalities into the overall platform. * Stay up-to-date with the latest blockchain technologies, security best practices, and industry trends. * Participate in the architectural design and technical decision-making process. Requirements: * Bachelor's or Master's degree in Computer Science, Engineering, or a related field. * 3+ years of experience in blockchain development, with a strong focus on smart contracts. * Proficiency in Solidity, Rust, or other relevant smart contract languages. * Experience with blockchain development frameworks (e.g., Hardhat, Truffle, Foundry). * Solid understanding of blockchain principles, consensus mechanisms, and cryptographic protocols. * Familiarity with Web3.js, Ethers.js, or similar libraries for blockchain interaction. * Experience with version control systems (Git). * Excellent problem-solving skills and attention to detail. * Strong English communication skills (written and verbal). Chinese written and verbal proficiency are highly preferred. Nice to Have: * Experience with Layer 2 solutions (e.g., Polygon, Arbitrum). * Knowledge of token standards (ERC-20, ERC-721, ERC-1155). * Experience with decentralized finance (DeFi) protocols. Job Type: Full-time Pay: 10,000,000₫ - 40,000,000₫ per month
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Blockchain/Decentralized Systems Developer – MLM Platform
From $20/yr
Job Title: Blockchain/Decentralized Systems Developer – MLM PlatformOverview We are seeking a highly skilled Blockchain Developer with expertise in building decentralized systems and smart contract-based MLM platforms. The ideal candidate will have experience in designing and implementing scalable, secure, and transparent blockchain applications that support multi-level referral and reward structures. Key Responsibilities * Design, develop, and deploy smart contracts for MLM reward distribution on blockchain networks (e.g., Ethereum, Binance Smart Chain, Polygon, Solana). * Build a decentralized backend for user registration, wallet integration, and automated payment processing. * Implement secure and transparent MLM logic (levels, commissions, bonuses, referrals, payouts). * Develop APIs and integrations with front-end applications (web, mobile). * Ensure data immutability, fraud resistance, and scalability of the MLM platform. * Conduct regular audits, testing, and optimization of smart contracts. * Collaborate with UI/UX and product teams to deliver a smooth user experience. * Stay updated with blockchain, Web3, and DeFi trends to enhance platform capabilities. Required Skills \& Qualifications * Strong programming skills in Solidity, Rust, or Go (depending on blockchain). * Hands-on experience with Ethereum Virtual Machine (EVM) or other decentralized ecosystems. * Knowledge of decentralized finance (DeFi), tokenomics, and staking mechanisms. * Proficiency in Node.js, Web3.js, or ethers.js for blockchain integrations. * Experience with wallet integrations (MetaMask, Trust Wallet, WalletConnect, etc.). * Solid understanding of cryptography, consensus mechanisms, and gas optimization. * Experience deploying dApps on Ethereum, BSC, or Layer-2 solutions. * Familiarity with smart contract auditing tools (MythX, Slither, OpenZeppelin). * Strong problem-solving skills and ability to work in agile development environments. Preferred Qualifications * Previous experience in MLM or referral-based blockchain projects. * Knowledge of cross-chain bridges and interoperability. * Experience in designing tokenomics (ERC-20, ERC-721, ERC-1155). * Understanding of DAO governance mechanisms. What We Offer * Opportunity to build a next-gen decentralized MLM platform. * Competitive compensation (salary + potential token/coin incentives). * Remote-first work environment with flexible hours. * A chance to innovate in the fast-growing Web3/crypto industry. Job Types: Full-time, Part-time, Permanent Pay: ₹13,981.26 - ₹64,088.84 per month Work Location: Remote
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Blockchain Developer
Mundy Buddy Publishing LLC.Rockville, MD
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Lead Software Engineer - Blockchain Developer
JPMorganChaseJersey City, NJ, US
JOB DESCRIPTION Be an integral part of an agile team that's constantly pushing the envelope to enhance, build, and deliver top-notch technology products. As a Lead Software Engineer at JPMorgan Chase within Commercial and Investment Banking team, you will play a key role in an agile team dedicated to building, enhancing, and delivering trusted, market-leading technology products. You will leverage your deep technical expertise and problem-solving skills to address complex challenges across multiple technologies and applications, driving significant business impact through your contributions. Roles and Responsibilities Design Peer-to-peer distributed systems and implement using multiple technology stacks. Familiarity with key blockchain technologies \& understanding. Collaborate with various line of business technology teams to design and build robust and performant blockchain-based solutions. Design and implement blockchain supporting tools and utilities (e.g., CLI client, tools for exploring the blockchain, monitoring, benchmarking or debugging tools) Implement rigorous and thorough testing practices to ensure the security and performance goals of blockchain infrastructure. Implement rigorous and thorough monitoring and testing practices to ensure the security and performance goals of blockchain infrastructure Design and verify cryptographic protocols deployed on the blockchain Design blockchain solutions, such that it can support benchmark use-cases of decentralized applications, with proven and verified cryptographic protocols Build out monitoring protocols and fail-over measures. Collaborate with development teams to develop integration design and where appropriate prepare estimates on design and development services for integration initiatives Required Skills Formal training or certification in software engineering concepts and 5+ years of applied experience Hands-on knowledge of end-2-end development in web3 ecosystem – such as smart contract development, deployment, interaction with RPC providers, integrating with key management systems. Strong familiarity with different layers, such as Ethereum, Layer2 protocols Strong object-oriented programming language background in one or more of the following languages: Go, C++, Rust, Java, JavaScript Experience in Developing and Designing large and complex distributed computing environments Proven track record of delivering software development projects Experience with cloud infrastructure services AWS and Kubernetes. Familiarity with using Git or other version control software for source code management Desired Skills Financial industry experience Thorough understanding of cryptographic protocols and blockchain implementations Good understanding in key management, custody solutions and cryptographic fundamentals Awareness of inter-operability solutions. Strong analytical and problem-solving skills Self-starter that requires minimal supervision Flexible / adaptable - able to work with diverse groups of people including all levels of business management Excellent project management and facilitation skills ABOUT US JPMorganChase, one of the oldest financial institutions, offers innovative financial solutions to millions of consumers, small businesses and many of the world’s most prominent corporate, institutional and government clients under the J.P. Morgan and Chase brands. Our history spans over 200 years and today we are a leader in investment banking, consumer and small business banking, commercial banking, financial transaction processing and asset management. We offer a competitive total rewards package including base salary determined based on the role, experience, skill set and location. Those in eligible roles may receive commission-based pay and/or discretionary incentive compensation, paid in the form of cash and/or forfeitable equity, awarded in recognition of individual achievements and contributions. We also offer a range of benefits and programs to meet employee needs, based on eligibility. These benefits include comprehensive health care coverage, on-site health and wellness centers, a retirement savings plan, backup childcare, tuition reimbursement, mental health support, financial coaching and more. Additional details about total compensation and benefits will be provided during the hiring process. We recognize that our people are our strength and the diverse talents they bring to our global workforce are directly linked to our success. We are an equal opportunity employer and place a high value on diversity and inclusion at our company. We do not discriminate on the basis of any protected attribute, including race, religion, color, national origin, gender, sexual orientation, gender identity, gender expression, age, marital or veteran status, pregnancy or disability, or any other basis protected under applicable law. We also make reasonable accommodations for applicants’ and employees’ religious practices and beliefs, as well as mental health or physical disability needs. Visit our FAQs for more information about requesting an accommodation. JPMorgan Chase \& Co. is an Equal Opportunity Employer, including Disability/Veterans ABOUT THE TEAM J.P. Morgan’s Commercial \& Investment Bank is a global leader across banking, markets, securities services and payments. Corporations, governments and institutions throughout the world entrust us with their business in more than 100 countries. The Commercial \& Investment Bank provides strategic advice, raises capital, manages risk and extends liquidity in markets around the world.
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J
Lead Software Engineer - Blockchain Developer
JPMorganChaseJersey City, NJ, US
JOB DESCRIPTION Be an integral part of an agile team that's constantly pushing the envelope to enhance, build, and deliver top-notch technology products. As a Lead Software Engineer at JPMorgan Chase within Commercial and Investment Banking team, you will play a key role in an agile team dedicated to building, enhancing, and delivering trusted, market-leading technology products. You will leverage your deep technical expertise and problem-solving skills to address complex challenges across multiple technologies and applications, driving significant business impact through your contributions. Roles and Responsibilities Design Peer-to-peer distributed systems and implement using multiple technology stacks. Familiarity with key blockchain technologies \& understanding. Collaborate with various line of business technology teams to design and build robust and performant blockchain-based solutions. Design and implement blockchain supporting tools and utilities (e.g., CLI client, tools for exploring the blockchain, monitoring, benchmarking or debugging tools) Implement rigorous and thorough testing practices to ensure the security and performance goals of blockchain infrastructure. Implement rigorous and thorough monitoring and testing practices to ensure the security and performance goals of blockchain infrastructure Design and verify cryptographic protocols deployed on the blockchain Design blockchain solutions, such that it can support benchmark use-cases of decentralized applications, with proven and verified cryptographic protocols Build out monitoring protocols and fail-over measures. Collaborate with development teams to develop integration design and where appropriate prepare estimates on design and development services for integration initiatives Required Skills Formal training or certification in software engineering concepts and 5+ years of applied experience Hands-on knowledge of end-2-end development in web3 ecosystem – such as smart contract development, deployment, interaction with RPC providers, integrating with key management systems. Strong familiarity with different layers, such as Ethereum, Layer2 protocols Strong object-oriented programming language background in one or more of the following languages: Go, C++, Rust, Java, JavaScript Experience in Developing and Designing large and complex distributed computing environments Proven track record of delivering software development projects Experience with cloud infrastructure services AWS and Kubernetes. Familiarity with using Git or other version control software for source code management Desired Skills Financial industry experience Thorough understanding of cryptographic protocols and blockchain implementations Good understanding in key management, custody solutions and cryptographic fundamentals Awareness of inter-operability solutions. Strong analytical and problem-solving skills Self-starter that requires minimal supervision Flexible / adaptable - able to work with diverse groups of people including all levels of business management Excellent project management and facilitation skills ABOUT US JPMorganChase, one of the oldest financial institutions, offers innovative financial solutions to millions of consumers, small businesses and many of the world’s most prominent corporate, institutional and government clients under the J.P. Morgan and Chase brands. Our history spans over 200 years and today we are a leader in investment banking, consumer and small business banking, commercial banking, financial transaction processing and asset management. We offer a competitive total rewards package including base salary determined based on the role, experience, skill set and location. Those in eligible roles may receive commission-based pay and/or discretionary incentive compensation, paid in the form of cash and/or forfeitable equity, awarded in recognition of individual achievements and contributions. We also offer a range of benefits and programs to meet employee needs, based on eligibility. These benefits include comprehensive health care coverage, on-site health and wellness centers, a retirement savings plan, backup childcare, tuition reimbursement, mental health support, financial coaching and more. Additional details about total compensation and benefits will be provided during the hiring process. We recognize that our people are our strength and the diverse talents they bring to our global workforce are directly linked to our success. We are an equal opportunity employer and place a high value on diversity and inclusion at our company. We do not discriminate on the basis of any protected attribute, including race, religion, color, national origin, gender, sexual orientation, gender identity, gender expression, age, marital or veteran status, pregnancy or disability, or any other basis protected under applicable law. We also make reasonable accommodations for applicants’ and employees’ religious practices and beliefs, as well as mental health or physical disability needs. Visit our FAQs for more information about requesting an accommodation. JPMorgan Chase \& Co. is an Equal Opportunity Employer, including Disability/Veterans ABOUT THE TEAM J.P. Morgan’s Commercial \& Investment Bank is a global leader across banking, markets, securities services and payments. Corporations, governments and institutions throughout the world entrust us with their business in more than 100 countries. The Commercial \& Investment Bank provides strategic advice, raises capital, manages risk and extends liquidity in markets around the world.
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