Senior Backend Engineer Finapps/Access

About the Role You will design and implement robust backend services that handle high-volume on-chain transactions across multiple blockchain networks including EVM and non-EVM. You will own backend components and APIs from architecture decisions to production deployment. You will lead integrations with DeFi protocols, on-chain data sources, and blockchain nodes across a wide range of chains and ecosystems. You will research and evaluate emerging blockchain technologies, protocols, and standards to keep the platform at the cutting edge. You will optimize existing production systems for performance, reliability, and security, reducing latency and increasing throughput. You will collaborate with product, protocol research, and platform engineering teams to deliver high-quality solutions on time. You will drive features from inception through to delivery at scale, taking full ownership of the product lifecycle.

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 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.

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 to keep the platform 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.

Benefits Competitive compensation Meaningful equity Ownership and initiative culture Funding Investors Senior Python Engineer Crystal Blockchain B.V. · 1 week ago Senior Python Engineer (Remote) Crystal Blockchain B.V. · 1 week ago Senior Software Engineer Backend TRM Labs · 1 week ago Senior Software Engineer Fiat Payments & Banking Infrastructure Zero Hash LLC · 2 weeks ago Senior Software Engineer, Backend & API Integrations Reap · 3 weeks ago Funding Investors Senior Python Engineer Crystal Blockchain B.V. · 1 week ago Senior Python Engineer (Remote) Crystal Blockchain B.V. · 1 week ago Senior Software Engineer Backend TRM Labs · 1 week ago Senior Software Engineer Fiat Payments & Banking Infrastructure Zero Hash LLC · 2 weeks ago Senior Software Engineer, Backend & API Integrations Reap · 3 weeks ago