Full Stack Engineer, Blockchain

Fireblocks is looking for a Senior Full Stack Engineer (Blockchain) in London to design and build scalable backend services for high-volume on-chain transaction flows. 7+ years of backend/full stack experience required.

Fireblocks' platform and network provide the simplest and most secure way for companies to work with digital assets, trusted by BNY Mellon, BNP Paribas, ANZ Bank, Revolut, and thousands more. Design and build robust, scalable backend services supporting high-volume on-chain transaction flows across multiple blockchain networks — both EVM and non-EVM Own end-to-end development of backend components and APIs — from architecture decisions to production deployment Lead integrations with DeFi protocols, on-chain data sources, and blockchain nodes across a wide range of chains Optimize existing production systems for performance, reliability, and security — reducing latency and increasing throughput

7+ years of experience as a Backend or Full Stack Engineer Blockchain and Web3 experience are a must — including deep understanding of transaction lifecycles, consensus mechanisms, smart contract interactions Proven experience working across multiple blockchain ecosystems — EVM-compatible chains as well as non-EVM chains such as Solana, TON, Tron Proficiency in Node.js and TypeScript