Senior Backend Engineer – Finapps/Access
Fireblocks is an enterprise-grade platform delivering a secure infrastructure for moving, storing, and issuing digital assets. It enables exchanges, custodians, banks, trading desks, and hedge funds to securely scale digital asset operations through its patent-pending SGX & MPC technology.
About Fireblocks
Fireblocks is an enterprise-grade platform that provides a secure infrastructure for moving, storing, and issuing digital assets. It enables financial institutions like exchanges, custodians, banks, trading desks, and hedge funds to securely scale their digital asset operations. The company was founded by Michael Shaulov, Idan Ofrat, and Pavel Berengoltz after they investigated a major cyber breach. Fireblocks utilizes breakthrough Multi-Party Computation (MPC) and patent-pending chip isolation technology to secure private keys and API credentials. The platform supports various use cases including treasury management, wallet as a service, tokenization, payments, and DeFi, and provides a complete development platform with APIs, SDKs, and tutorials for building on the blockchain.
Skills
About the Role
You'll design and build robust, scalable backend services that support high-volume on-chain transaction flows across multiple blockchain networks, both EVM and non-EVM. You'll own end-to-end development of backend components and APIs, from architecture decisions through to production deployment. You'll lead integrations with DeFi protocols, on-chain data sources, and blockchain nodes across a wide range of chains and ecosystems. You'll research and evaluate emerging blockchain technologies, protocols, and standards to keep your work at the cutting edge. You'll optimize existing production systems for performance, reliability, and security, reducing latency and increasing throughput. You'll collaborate closely with product, protocol research, and platform engineering teams to deliver high-quality solutions on time, driving features from inception through to delivery at scale.
Requirements
- 7+ years of experience as a Backend or Full Stack Engineer.
- Bachelor of Science (B.Sc.) or equivalent degree/experience.
- Blockchain and Web3 experience including deep understanding of transaction lifecycles, consensus mechanisms, smart contract interactions, and on-chain data.
- Proven experience working across multiple blockchain ecosystems, including EVM-compatible chains and non-EVM chains such as Solana, TON, or Tron.
- 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 such as AMMs, lending markets, bridging infrastructure, or on-chain routing.
- Experience with Web3 tooling and libraries such as ethers.js, viem, web3.js, and Solana web3.js.
- Demonstrated experience taking products from inception to delivery at scale.
- Full stack experience with React and frontend development is a nice to have.
Responsibilities
- 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.
- Optimize existing production systems for performance, reliability, and security.
- Collaborate closely with product, protocol research, and platform engineering teams.
- Drive features from inception through to delivery at scale.