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.
