Blockchain & Node.js Developer with 5+ years of experience in building high-load backend systems and blockchain infrastructures. Skilled in designing and implementing architectures for DeFi, NFT, P2E, and fintech platforms. Proficient in full-cycle development - from API and microservices design to production deployment and maintenance. Passionate about decentralized technologies, clean architecture, and scalable solutions. Key Skills Backend: Node.js, Nest.js, Express.js, Redis, MongoDB, PostgreSQL, Neo4j, Kafka, Nginx, gRPC Blockchain: Solidity, Web3.js, Ethers.js, Ethereum, Polygon, EVM, DAO, NFT, DeFi, Smart Contracts DevOps: CI/CD (GitHub Actions, GitLab CI), Docker,Nginx, ELK stack Architecture: Microservices, Event-Driven Architecture, DDD, SOLID, Clean Architecture Languages: TypeScript, JavaScript, Solidity