Full Stack Engineer, Blockchain
On-siteLondon, England, United Kingdom
Job Summary
Design and build robust, scalable backend services supporting high-volume on-chain transaction flows across multiple blockchain networks, from EVM to non-EVM chains. Own end-to-end development of backend components and APIs, including architecture decisions through production deployment. Lead integrations with DeFi protocols, on-chain data sources, and blockchain nodes while optimizing existing systems for performance, reliability, and security. Research emerging blockchain technologies and drive features from inception through delivery at scale, collaborating closely with product, protocol research, and platform engineering teams.
Required Qualifications
- 7+ years of experience as a Backend or Full Stack Engineer
- Bachelor of Science (B.Sc.) or equivalent degree/experience
- Blockchain and Web3 experience
- deep understanding of transaction lifecycles
- consensus mechanisms
- smart contract interactions
- on-chain data
- Proven experience working across multiple blockchain ecosystems
- EVM-compatible chains (Ethereum, Polygon, Arbitrum, Base, etc.)
- non-EVM chains such as Solana, TON, Tron, or similar
- Proficiency in Node.js and TypeScript
- Experience designing and operating microservices in production CI/CD environments
- Strong understanding of security principles
- cryptography
- best practices in a blockchain context
- Demonstrated experience taking products from inception to delivery at scale
- Full stack experience (React, frontend development)
Desired Qualifications
- Familiarity with DeFi protocols — AMMs, lending markets, bridging infrastructure, or on-chain routing
- Experience with Web3 tooling and libraries (ethers.js, viem, web3.js, Solana web3.js, etc.)
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