Blockchain Engineer

Role & responsibilities

• Design, develop, test, deploy, and maintain secure and scalable blockchain applications and platforms.
• Develop and optimize smart contracts using Solidity, Rust, or other blockchain programming languages.
• Build and integrate decentralized applications (dApps) with blockchain networks, wallets, APIs, and off-chain services.
• Design blockchain solutions across Ethereum, EVM-compatible networks, Layer 1, Layer 2, and rollup ecosystems.
• Implement blockchain integrations including wallets, token standards, exchanges, custodians, oracles, and third-party Web3 services.
• Develop backend services, APIs, indexing systems, and data pipelines that interact with blockchain networks.
• Conduct smart-contract testing, debugging, code reviews, security assessments, and gas optimization.
• Implement best practices for smart-contract security, access control, upgradeability, key management, and vulnerability prevention.
• Work with blockchain nodes, RPC providers, indexers, and on-chain data systems to ensure reliable application performance.
• Build automated testing and CI/CD pipelines for smart contracts and blockchain applications.
• Monitor blockchain applications and infrastructure for performance, reliability, security, and operational issues.
• Troubleshoot production issues involving smart contracts, transactions, nodes, APIs, wallets, and blockchain integrations.
• Collaborate with product managers, architects, frontend/backend engineers, security teams, and DevOps teams to deliver end-to-end solutions.
• Evaluate emerging blockchain protocols, frameworks, development tools, and Web3 technologies for potential adoption.
• Contribute to technical documentation, architecture decisions, development standards, and engineering best practices.
• Participate in security audits and coordinate remediation of vulnerabilities identified through internal or external reviews.

Preferred candidate profile

• 5 to 10 years of experience in software engineering, blockchain development, Web3, distributed systems, or a related technical field.
• Strong hands-on experience developing production-grade blockchain applications and smart contracts.
• Strong proficiency in Solidity and Ethereum/EVM, with experience in Rust, Go, or TypeScript being an advantage.
• Solid understanding of blockchain architecture, distributed systems, consensus mechanisms, cryptography, transactions, gas mechanics, and network architecture.
• Experience with Ethereum, EVM-compatible chains, Layer 1/Layer 2 networks, rollups, or other major blockchain ecosystems.
• Strong knowledge of smart-contract development, testing, security, auditing, upgradeability, and gas optimization.
• Hands-on experience with Foundry, Hardhat, OpenZeppelin, Ethers.js, Web3.js, or equivalent blockchain development tools.
• Experience building or integrating dApps, DeFi applications, token systems, wallets, blockchain APIs, or Web3 infrastructure.
• Familiarity with ERC-20, ERC-721, ERC-1155 and other token standards.
• Understanding of zero-knowledge proofs, ZK-rollups, account abstraction, cross-chain interoperability, oracles, and bridges is desirable.
• Experience working with blockchain nodes, RPC providers, indexing solutions, The Graph, IPFS, and on-chain data.
• Strong programming and software-engineering fundamentals, including data structures, algorithms, system design, APIs, databases, testing, Git, and CI/CD.
• Experience with Docker, Kubernetes, AWS/Azure/GCP, monitoring, and cloud infrastructure is an advantage.
• Strong debugging, analytical, problem-solving, and performance-optimization skills.
• Ability to work effectively with product, engineering, security, DevOps, and business teams.
• Strong understanding of secure software-development practices and willingness to participate in security audits and vulnerability remediation.
• Contributions to open-source blockchain projects, protocols, developer communities, or Web3 ecosystems are highly desirable.
• Bachelors degree in Computer Science, Engineering, Information Technology, or a related technical discipline; a Masters degree is an advantage.