Full-Stack Developer (Node.js / React)

Full-Stack Developer (Node.js/React) needed with strong backend/frontend, databases, networking and high-load architecture skills. Stack includes Node.js, Express, Sequelize, React, Vite, Tailwind, MySQL/PostgreSQL, WebSocket, Docker, Nginx, Redis, RabbitMQ, Elasticsearch.

Backend: Node.js, Express, Sequelize Frontend: React, Vite, Tailwind CSS, Zustand, Axios Databases: MySQL, PostgreSQL; confident work with transactions, locks, concurrent access; building and optimizing complex SQL queries; understanding race conditions and concurrency issues Infrastructure/DevOps: Docker, Nginx setup, Redis, RabbitMQ and task queues, Elasticsearch + Kibana, Prometheus + Grafana, understanding CDN, understanding DDoS protection at L3/L7, understanding proxy/reverse proxy Frontend: React, Vite, understanding native Webpack configuration, Tailwind CSS, Zustand, Axios, basic PixiJS, basic SEO understanding API/Integrations: ability to understand and work with undocumented APIs, OAuth and main authorization principles, Telegram Bot API, experience/understanding of TDLib AI tools: confident work with Claude and ChatGPT, using AI tools in daily development: code analysis and writing, refactoring, debugging and finding solutions; ability to correctly set technical tasks for neural networks and verify results Security: understanding SQL Injection and protection methods, checking type substitution and incorrect input data, race conditions, basic understanding of cryptography: RSA, SHA and hashing, understanding obfuscation, understanding browser/device fingerprinting Architecture: ability to design architecture of high-load systems, understanding scaling, fault tolerance and concurrent data processing, understanding interaction between services, queues, DB, cache and real-time components Nice to have: basic understanding of probability theory, understanding blockchain and main networks: Bitcoin, TON, Ethereum/ERC, TRON, experience with non-standard APIs and integrations