The client is an innovative global fintech leader behind USDT, the world’s largest and most widely used stablecoin.
We are looking for a Senior Backend Engineer with strong expertise in blockchain and crypto infrastructure to design, build, and scale high-performance backend systems interacting with EVM-based networks. This role focuses on blockchain integrations, transaction processing, distributed systems, and secure financial infrastructure at global scale.
Responsibilities: * Design, build, and maintain scalable backend services using Node.js (JavaScript/TypeScript) * Develop and optimize blockchain integrations with EVM-compatible networks * Implement Web3-based interactions (smart contract calls, transaction signing, event indexing) * Build secure services for transaction processing, wallet operations, and balance tracking * Integrate with RPC providers, blockchain nodes, and third-party crypto services * Design event-driven and distributed architectures for high-load financial systems * Optimize gas usage, transaction batching, and on-chain/off-chain communication * Implement monitoring, logging, and alerting for blockchain infrastructure * Ensure security best practices in key management, signing flows, and API protection * Write production-grade, well-tested code (unit, integration, load tests) * Collaborate with product, DevOps, and security teams in a fully remote environment
Requirements: * 7+ years of backend development experience * Strong proficiency in JavaScript / TypeScript * Deep experience with Node.js in production environments * Hands-on experience with Web3 libraries (ethers.js, web3.js, viem, etc.) * Strong understanding of EVM architecture and smart contracts * Experience designing scalable distributed systems * Strong understanding of security best practices in crypto environments * Hands-on experience with Docker and containerized environments * We are offering: * Transparent strategy and thoughtful management that keep everyone aligned * Space for personal growth and career development without limits * A culture of continuous learning: internal courses, workshops, and English classes twice a week * Skill up events where we share experience and stay on top of trends * Competitive perks: flexible schedule, a strong compensation package, support for professional certifications, and generous vacation policy * Team spirit that thrives through regular events, gatherings, and celebrations
