Senior Blockchain Engineer

We are looking for an experienced and motivated Senior Blockchain Engineer to design and build secure, high-performance blockchain solutions for institutional and enterprise clients. You will design and implement blockchain-based systems across the web3 ecosystem, from protocol-level components and smart contracts to institutional DeFi and enterprise-grade financial applications. This remote-first role involves deep collaboration with internal engineering and research teams, as well as external partners such as financial institutions, infrastructure providers, and blockchain foundations. You should bring strong proficiency in one or more general-purpose programming languages and hands‑on experience developing smart contracts in Solidity. A deep understanding of Ethereum’s architecture, solid engineering fundamentals, and a disciplined approach to problem‑solving are essential. The ideal candidate communicates clearly and thrives in complex, multi‑stakeholder environments. They understand enterprise and institutional constraints, including security, risk, auditability, and compliance, and can translate them into robust technical decisions. Experience building production‑grade EVM applications and systems for banks, asset managers, tokenizers, and institutional DeFi is highly valued. Responsibilities Design, develop, and maintain applications and services built on blockchain infrastructure. Build, test, and deploy secure smart contracts for institutional‑grade protocols (primarily in Solidity). Debug, profile, and optimize on‑chain and off‑chain components. Integrate blockchain data and transactions into enterprise‑grade systems. Develop tooling and automation scripts for blockchain operations. Collaborate closely with cross‑functional teams and external partners. Keep abreast of evolving blockchain protocols, tooling, and standards. Technical Skills 5+ years of professional software development experience, including 3+ years of Solidity or equivalent smart contract programming. Proven track record in building, testing, and deploying complex, production‑grade smart contracts using toolchains such as Foundry, Hardhat, or Remix. Strong programming skills in one or more general‑purpose languages such as Go, Rust, Python, TypeScript/JavaScript, C#, Java, or Kotlin. Solid understanding of algorithms, data structures, and computational efficiency. Strong grasp of software architecture, design principles, and modern engineering processes. Ability to write clean, testable, and maintainable code that balances simplicity and scalability. Deep understanding of Ethereum architecture, including its execution model, transaction lifecycle, and core components. Practical knowledge of the institutional DeFi ecosystem – lending/borrowing protocols, AMMs, perpetuals, vaults, tokenization, and stablecoins. Experience building off‑chain services and integrations that interact with web3 protocols using libraries such as ethers.js or web3.js. Other Competencies You need to be a self‑starter with the curiosity and drive to continuously improve. Excellent problem‑solving and analytical skills, with attention to detail. Strong written and verbal communication and collaboration skills. Proven ability to operate in distributed teams and collaborate across organizational boundaries (engineering, research, and client stakeholders). Proficiency in English. Nice to Have Experience with L2 networks (Starknet, Optimism, zkSync, Arbitrum). Familiarity with cryptographic primitives (hashing, signature schemes, zk‑proof systems). Understanding of financial instruments and tokenization use cases. Experience with smart contract security auditing and formal verification tools. Front‑end development experience (React, Angular) is a plus. DevOps or infrastructure setup for blockchain networks (private/testnet deployments). What We Offer / Benefits Flexible Work Options : Remote‑first culture with the opportunity to work from anywhere. Global and Diverse Workforce : You’ll work with people from various backgrounds and cultures. Learning and Development : You’ll work on innovative, challenging projects and have access to experts and mentors to enhance your skills. Career Growth : Access to training, mentorship, and opportunities to contribute to open‑source initiatives. Global Events and Conferences : Opportunities to attend industry events. Collaborative and Innovative Culture : We foster teamwork and encourage new ideas. Our Commitment to Diversity At Nethermind, we celebrate diversity and are committed to creating an inclusive environment for all team members. We believe a variety of perspectives drives innovation and leads to better solutions for the blockchain community. Ready to Join Us? If you’re passionate about blockchain and eager to make an impact, we’d love to hear from you. Click Apply for this job to start your journey with Nethermind. #J-18808-Ljbffr