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# Full Stack Engineer

- **Company:** Fireblocks
- **Location:** UK
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Software Quality, Continuous Integration, Node.Js, Blockchain, Software Deployment, TypeScript, ReactJS, Backend, Build Management, Ethereum, Web3.js, Front End Software Development, Microservices
- **Published:** September 5, 2026
- **Apply:** https://startup.jobs/full-stack-engineer-blockchain-fireblocks-8724627

## About the Role

* 7+ years of experience as a Backend or Full Stack Engineer.
 * Bachelor of Science (B.Sc.) or equivalent degree/experience.
 * Blockchain and Web3 experience are a must - including deep understanding of transaction lifecycles, consensus mechanisms, smart contract interactions, and on-chain data.
 * Proven experience working across multiple blockchain ecosystems - EVM-compatible chains (Ethereum, Polygon, Arbitrum, Base, etc.) as well as 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, and best practices in a blockchain context.
 * Familiarity with DeFi protocols - AMMs, lending markets, bridging infrastructure, or on-chain routing - is a strong advantage.
 * Experience with Web3 tooling and libraries (ethers.js, viem, web3.js, Solana web3.js, etc.).
 * Demonstrated experience taking products from inception to delivery at scale.
 * Full stack experience (React, frontend development) - a nice to have.

About You

 * You think in systems and care deeply about correctness, reliability, and scale.
 * You're comfortable navigating ambiguity and can drive technical decisions with limited oversight.
 * You have a natural curiosity for how blockchain protocols work under the hood - and you actually read the specs.
 * You thrive in fast-moving environments and can balance shipping velocity with long-term code quality.
 * You communicate clearly and collaborate effectively across engineering, product, and research.

## Description

* 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 and ecosystems.
 * Research and evaluate emerging blockchain technologies, protocols, and standards to keep Fireblocks at the cutting edge.
 * Optimize existing production systems for performance, reliability, and security - reducing latency and increasing throughput.
 * Collaborate closely with product, protocol research, and platform engineering teams to deliver high-quality solutions on time.
 * Drive features from inception through to delivery at scale, taking full ownership of the product lifecycle.


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