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Senior Blockchain Architect — Technical Feasibility Review

Canadaonsite

Overview: We are seeking a senior blockchain / solution architect to perform a time-boxed technical feasibility and architecture review of an existing concept. This engagement is review-only. There is no implementation, no coding, and no expectation of ongoing work. This is a short, high-leverage diligence exercise intended to validate system mechanics, identify constraints, and surface failure modes before any build decision is made. Scope of Work: • Review a highlevel system concept centered on ERC721–based ownership mechanics • Evaluate architectural feasibility, scalability, and edge cases • Assess system constraints, risks, and potential failure points • Provide written, structured feedback on: ~Technical soundness ~ Design risks ~ Assumptions that should be validated before build ~ Areas that are defensible vs. easily replicated This is not a request to design, improve, or implement a solution. Engagement Parameters: • Duration: Shortterm (less than one month) • Estimated time: 2–6 hours • Deliverable: Written technical review (bullet points or memo format) • No code access • No repository access • No frontend, UX, or marketplace discussion • NDA required prior to receiving details Required Background: • Seniorlevel experience in solution architecture or blockchain architecture • Direct familiarity with ERC721 and tokenized ownership models • Experience reviewing or validating systems prior to build • Comfort identifying weaknesses and saying "this breaks" where applicable Explicitly Out of Scope: • Writing code • Building an MVP • Suggesting implementation services • Ongoing advisory or contracttohire discussions If you are primarily a builder or are looking for long-term development work, this role is not a fit. What We Value: Clear thinking, conservative judgment, and direct communication. The goal is truth and risk reduction—not optimism. Contract duration of less than 1 month. with 30 hours per week. Mandatory skills: Blockchain Architecture, ERC-721, Tokenomics Design, Smart Contract Architecture, Systems Design, Technical Due Diligence, Security Analysis, Scalability Engineering, Risk Analysis, Solution Architecture Consultation

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Senior Blockchain Engineer Needed to Lead Startup Development

Canadaonsite

We are seeking a seasoned blockchain engineer to join our startup development team. The ideal candidate will have extensive experience in blockchain technology and a proven track record of leading product development from conceptualization to deployment. You will work closely with our team to define project requirements, design architecture, and ensure the timely delivery of high-quality blockchain solutions. If you're passionate about innovative technology and excited to shape the future of our product, we want to hear from you Contract duration of 3 to 6 months. with 40 hours per week. Mandatory skills: JavaScript, , Blockchain, Web Development, React, , Blockchain Architecture

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Blockchain Engineer

Canadaonsite

We are enhancing an educational and technical services platform focused on blockchain and distributed ledger technologies. We are looking for an experienced blockchain professional to help us improve the quality, accuracy, and structure of our blockchain-related services. This role is technical and educational in nature and does not involve financial promotion, trading, or investment activities. Key Responsibilities Review and improve blockchain-related technical workflows and materials Provide guidance on smart contract architecture and best practices Design sample implementations for educational or demonstration purposes Assist with documentation and technical explanations for learning use cases Advise on scalability, security, and maintainability of blockchain systems Required Skills & Experience Strong experience with blockchain architecture and decentralized systems Hands-on experience with smart contracts (e.g., Solidity or similar languages) Familiarity with Web3 tools and frameworks (e.g., , ) Understanding of token standards and on-chain logic Experience working with EVM-compatible blockchains Nice to Have Experience reviewing or auditing smart contracts Background in DeFi protocols or governance mechanisms Experience creating technical documentation or educational content Contributions to open-source blockchain projects Contract duration of 3 to 6 months. with 40 hours per week. Mandatory skills: Blockchain, JavaScript, Web Development, Blockchain Architecture, Python, Java, Cryptocurrency, , Technical Writing

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