Senior Backend Engineer – Finapps/Access
9.0/10
Fireblocks
$135,000 – $225,000 USD
Office / on-site
senior
9 days ago
cryptodevweb3Node.jsTypeScriptmicroservicesEVM-compatible chainsSolanacryptographyDeFi protocolsethers.jsweb3.js
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Description
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.
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.
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.
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