Senior Blockchain Engineer

Role & responsibilities

• Design, develop, and maintain scalable, secure, and high-performance blockchain solutions for enterprise and Web3 applications.
• Develop and deploy smart contracts using Solidity and EVM-compatible blockchain technologies.
• Build and integrate decentralized applications (dApps), blockchain APIs, wallets, tokenization platforms, and digital-asset solutions.
• Design blockchain components covering on-chain/off-chain architecture, transaction processing, data storage, indexing, and blockchain integrations.
• Work with Ethereum, Layer 1/Layer 2 networks, EVM-compatible chains, and other relevant blockchain protocols.
• Develop and optimize DeFi protocols, tokenization solutions, NFTs, stablecoins, staking, and other Web3 applications where applicable.
• Implement robust smart-contract security, testing, auditing, gas optimization, and vulnerability mitigation practices.
• Integrate blockchain applications with enterprise systems, payment platforms, APIs, databases, wallets, oracles, and external services.
• Build backend services and APIs using technologies such as Node.js, Go, Python, or TypeScript.
• Develop blockchain infrastructure including nodes, RPC services, indexing, event processing, and blockchain data pipelines.
• Optimize blockchain applications for performance, scalability, reliability, transaction throughput, and gas efficiency.
• Implement automated unit, integration, smart-contract, security, and end-to-end testing.
• Work with DevOps teams to establish CI/CD, containerization, Kubernetes, cloud deployment, monitoring, and observability.
• Participate in architecture reviews, code reviews, technical design discussions, and engineering best-practice initiatives.
• Collaborate with product managers, architects, security teams, data engineers, and business stakeholders to translate requirements into technical solutions.
• Research and evaluate emerging technologies including Zero-Knowledge Proofs, Layer 2, cross-chain interoperability, account abstraction, tokenization, and blockchain infrastructure.
• Mentor junior and mid-level blockchain engineers and provide technical leadership on complex projects.
• Ensure solutions meet applicable security, privacy, regulatory, compliance, and digital-asset governance requirements, particularly in financial-services environments.

Preferred candidate profile

• 5 to 10 years of software engineering experience, with significant hands-on experience in blockchain/Web3 development.
• Strong expertise in Ethereum, EVM, Solidity, smart contracts, blockchain protocols, and decentralized applications.
• Proven experience building and deploying production-grade smart contracts and blockchain applications.
• Strong programming skills in Solidity and at least one of Go, Rust, Python, JavaScript, or TypeScript.
• Hands-on experience with Web3.js, Ethers.js, Hardhat, Foundry, Truffle, Remix, or equivalent development frameworks.
• Strong understanding of smart-contract security, vulnerability assessment, testing, auditing, gas optimization, and secure coding practices.
• Experience with DeFi, tokenization, NFTs, DAOs, stablecoins, staking, digital assets, and blockchain-based financial applications.
• Knowledge of Layer 1/Layer 2 networks, Ethereum scaling, Polygon, Arbitrum, Optimism, Base, Solana, or other blockchain ecosystems is advantageous.
• Understanding of cryptography, consensus mechanisms, wallets, private-key management, transaction lifecycle, RPC, nodes, and blockchain data structures.
• Experience with blockchain indexing and data technologies such as The Graph, GraphQL, Kafka, or custom indexing solutions.
• Experience integrating oracles, Chainlink, cross-chain protocols, bridges, decentralized storage, and external APIs is desirable.
• Strong backend and distributed-systems knowledge, including REST APIs, microservices, databases, event-driven architecture, and system design.
• Experience with AWS/Azure/GCP, Docker, Kubernetes, CI/CD, Git, DevOps, monitoring, and cloud-native development.
• Strong understanding of performance optimization, scalability, high availability, and distributed systems.
• Experience in financial services, fintech, digital assets, payments, tokenization, custody, or banking is highly desirable for Singapore-based roles.
• Knowledge of KYC/AML, digital-asset regulations, cybersecurity, data privacy, and financial-services compliance is an advantage.
• Strong problem-solving, analytical, communication, collaboration, and technical leadership skills.
• Experience conducting code reviews, architecture reviews, mentoring, and technical design sessions.
• Bachelor's degree in Computer Science, Information Technology, Software Engineering, Computer Engineering, Mathematics, or a related technical discipline.
• Master's degree in Computer Science, Blockchain, Distributed Systems, Cybersecurity, or FinTech is an advantage.
• Relevant certifications in Blockchain, Ethereum, Cloud, Cybersecurity, or Smart Contract Development are desirable.