Senior Backend Blockchain Engineer

About The Role

We’re looking for a Senior Backend Engineer to build the backbone of on-chain access for large-scale blockchain applications. You’ll work at the intersection of blockchain protocol engineering and enterprise-grade reliability, designing systems that route, protect, and optimize transactions across multiple blockchain networks.

You’ll contribute to mission-critical infrastructure powering DeFi connectivity, multi-chain integrations, transaction execution pipelines, and on-chain data access.

Requirements

• 7+ years of experience as a Backend or Full Stack Engineer;
• Strong commercial experience with Blockchain and Web3 technologies, including a 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 (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 blockchain best practices;
• Familiarity with DeFi protocols, including AMMs, lending markets, bridging infrastructure, or on-chain routing, is a strong advantage;
• Experience with Web3 tooling and libraries such as ethers.js, viem, web3.js, Solana web3.js, or similar;
• Demonstrated experience taking products from inception to delivery at scale;
• Bachelor’s degree in Computer Science or equivalent practical experience;
• Upper-intermediate level of English.
  
  

Responsibilities

• Design and build robust, scalable backend services supporting high-volume on-chain transaction flows across multiple blockchain networks, including both EVM and non-EVM chains;
• Own the 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 multiple blockchain ecosystems;
• Research and evaluate emerging blockchain technologies, protocols, and standards;
• 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;
• Drive features from inception through delivery, taking full ownership of the product lifecycle.
  
  

Our Benefits

• Flexible part-time hours matching your schedule;
• Professional and career growth promotion;
• Competitive compensation based on tracked hours or fixed retainer;
• Internal Medical Program;
• Program for veterans;
• Regular technical training at our office;
• English courses.