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Senior Backend Engineer – Finapps/Access
FireblocksDigital Asset company
Warsaw, PolandPLN 300,000 – 3800,000 gross annuallySenior
Altimeter Capital
Coatue
Build Collective
Cyverse Capital
Haun Ventures Management
Software Engineering
About the role
TL;DR
Builds on-chain access infrastructure for financial institutions and crypto organizations.
- •Fireblocks is seeking a Senior Backend Engineer to join the FinApps Access team.
- •This role involves building the backbone of on-chain access for major financial institutions and crypto-native organizations, operating at the intersection of blockchain protocol engineering and enterprise-grade reliability.
- •Key Responsibilities Design and build robust, scalable backend services for high-volume on-chain transaction flows across multiple blockchain networks.
- •Own end-to-end development of backend components and APIs, from architecture to production deployment.
- •Lead integrations with DeFi protocols, on-chain data sources, and blockchain nodes.
- •Optimize existing production systems for performance, reliability, and security.
- •Requirements 7+ years of experience as a Backend or Full Stack Engineer.
- •Blockchain and Web3 experience, including deep understanding of transaction lifecycles and on-chain data.
- •Proficiency in Node.js and TypeScript.
- •Experience working across multiple blockchain ecosystems (EVM and non-EVM).
Required skills
Node.jsTypeScriptMicroservicesREST APIGitLinuxPython
Nice-to-have skills
React
Domain expertise
cryptofintech
Tech stack
Node.jsTypeScriptReactPythonGoRustJava