Senior Backend Engineer with 6+ years of experience building scalable, production-ready systems. I specialize in the Node.js ecosystem (TypeScript, NestJS, Express) and have deep expertise in blockchain infrastructure — from multi-currency crypto payment gateways and HD wallet services to real-time on-chain monitoring and scraping pipelines.

I build where performance, security, and scalability intersect. Whether it's a UTXO-based chain, an EVM Layer 2, a Telegram bot, or an event-driven microservice — I engineer systems that hold up under pressure.

• Backend Architecture — Scalable microservices, clean architecture, modular monorepos, and event-driven design with RabbitMQ and message queues.
• Crypto Payment Gateways — Multi-chain UTXO & account-based wallets, HD wallet derivation, real-time transaction monitoring across 10+ networks.
• API Engineering — Production-grade REST, GraphQL, WebSocket, and JSON-RPC APIs with auth, rate limiting, and developer-friendly docs.
• Bot Development — Full-featured bots for Telegram, Bale, and Rubika, including inline keyboards, webhooks, state machines, and payment integrations.
• Web Scraping — Headless browser pipelines with Puppeteer, Playwright, and Cheerio, including anti-detection and proxy rotation strategies.
• Performance Engineering — Redis caching, DB indexing, query optimization, load testing, and horizontal scaling.
• DevOps & TDD — Docker, Linux server management, CI/CD pipelines with GitHub Actions, Jest, and test-driven development practices.