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Senior Backend Engineer Finapps Access

2 weeks agoLeadSalary: 300K - 3.8MWarsaw, PolandBackendJobs by Fireblocks
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Fireblocks

Fireblocks is a digital asset infrastructure platform that helps financial institutions, fintechs, and businesses store, transfer, issue stablecoins, and manage digital assets securely.

Series E18 current maintainers14 active leads9 new active leads10 lead step-downs3 early lead departuresTeam intelligence

Maintainer signals as of 8/14/2026

United States
About Fireblocks

Fireblocks provides digital asset infrastructure for financial institutions, fintechs, and businesses handling digital assets at scale. Users can secure custody, issue stablecoins, tokenize assets, process payments, and manage wallets through a unified platform. The platform uses multi-party computation cryptography with policy-based governance to secure private keys and automate transaction workflows.

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Skills

Candidate Availability

Required and preferred rules are kept separate and reflect the wording in the original posting.

About the Role

You will design and build backend services for high-volume on-chain transaction flows across EVM and non-EVM networks. You will own backend components and APIs from architecture through deployment, integrate DeFi protocols and blockchain nodes, evaluate emerging technologies, optimize production systems, and deliver features at scale.

Requirements

  • 7+ years of backend or full-stack engineering experience
  • Bachelor of Science degree or equivalent experience
  • Deep understanding of blockchain transaction lifecycles consensus mechanisms smart contract interactions and on-chain data
  • Experience across EVM and non-EVM blockchain ecosystems
  • Proficiency in Node.js and TypeScript
  • Experience designing and operating production microservices
  • Experience with CI/CD environments
  • Understanding of security principles and cryptography in blockchain
  • Familiarity with DeFi protocols
  • Experience with ethers.js viem web3.js or Solana web3.js
  • Experience taking products from inception to delivery at scale
  • React or frontend development experience is a plus

Responsibilities

  • Design and build scalable backend services
  • Develop and deploy backend components and APIs
  • Integrate DeFi protocols on-chain data sources and blockchain nodes
  • Research blockchain technologies protocols and standards
  • Optimize production systems for performance reliability and security
  • Collaborate with product protocol research and platform engineering teams
  • Drive features from inception through scaled delivery

Benefits

  • Meaningful equity
  • Generous benefits
Senior Backend Engineer Finapps Access at Fireblocks | JobStash