Blockchain Security Engineer

**About ABFinance** ABFinance is a US\-based firm building and enabling digital finance for the future. Their vision is to create a full financial ecosystem where digital assets, traditional finance, and everyday money management live in one seamless experience, made available to everyone. Founded by a team of innovators, traders, and compliance professionals, ABFinance's mission is to bring the emerging world of digital assets to everyone. Their flagship product is a secure, regulated crypto exchange building trading tools for both retail and institutional clients—including spot trading and yield generation products with a focus on compliance and security. **Job Responsibility** * Design, implement, and maintain security solution and architectures for Web3 protocols (e.g., blockchain, smart contracts) and cryptocurrency wallets (custodial/non\-custodial). * Conduct security assessments, penetration testing, and vulnerability audits of Web3 infrastructure, smart contracts (Solidity/Vyper), and wallet applications (web/mobile/desktop). * Collaborate with blockchain developers to integrate secure coding practices and implement encryption standards for asset protection. * Respond to security incidents related to Web3 ecosystems, including forensic analysis and post\-incident remediation. * Research emerging Web3 security threats, zero\-day vulnerabilities, and industry best practices to enhance defense mechanisms. **Job Requirements** * Proficiency in Web3 technologies: blockchain fundamentals (Ethereum, Solana, etc.), smart contract development (Solidity), and wallet infrastructure (BIP\-39, BIP\-44, MetaMask SDK). * Strong background in application security, with experience in penetration testing (OWASP Top 10, Web3\-specific vulnerabilities). * Knowledge of cryptography: public/private key management, hash functions, digital signatures, and secure multi\-party computation (SMPC). * Experience with secure coding practices for Web3 applications and cross\-chain interoperability security. * Excellent problem\-solving skills and ability to work in fast\-paced, decentralized environments. * Bachelor’s degree in Computer Science, Cybersecurity, or related field Job Type: Full\-time Benefits: * Employee assistance program * Flexible schedule * Parental leave Work Location: Remote