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cryptodevweb3Backend Developer
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About this role
Join Fireblocks as a Senior Backend Engineer to build robust backend services for high-volume on-chain transactions across multiple blockchain networks. Competitive salary and a chance to work at the forefront of blockchain infrastructure.
Description
Fireblocks is on a mission to enable every business to easily and securely access digital assets and cryptocurrencies. As a leading provider in the digital asset space, we are committed to fostering a diverse and inclusive workforce that mirrors the global clientele we serve.
Responsibilities
What You'll Do
- 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.
Requirements
What You'll Bring
- 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.
Conditions & Benefits
Why Fireblocks
- Work at the frontier of blockchain infrastructure, with real impact on how DeFi scales for institutional and retail users.
- Tackle genuinely hard engineering problems — multi-chain routing, on-chain data indexing, protocol integrations, and more.
- Collaborate with world-class engineers, protocol researchers, and product minds in a fast-growing global company.
- Competitive compensation, meaningful equity, and a culture that rewards ownership and initiative.
Job Details
Salary$135,000–$225,000
LocationOffice
AI Score★★★★★★★★★☆ 9/10
PostedMay 19, 2026 (69d ago)
Tags & Skills
cryptodevweb3Backend Developeroffice
Tech Stack
Node.jsTypeScriptmicroservicesEVM-compatible chainsSolanacryptographyDeFi protocolsethers.jsweb3.js