Full-Stack Developer (Node.js / React)

Full-Stack Developer (Node.js / React) sought for backend/frontend development, databases, networking, and high-load system architecture. Main stack: Node.js, Express, React, Vite, MySQL/PostgreSQL, WebSocket.

Seeking a strong Full-Stack developer with a good understanding of backend/frontend development, databases, networking, and architecture of high-load systems.

Backend: Node.js, Express, Sequelize Frontend: React, Vite, Tailwind CSS, Zustand, Axios Databases: MySQL, PostgreSQL Real-time: WebSocket, Socket.IO, Centrifugo Databases: Confident work with MySQL/PostgreSQL; transactions, locks, concurrent access; building and optimizing complex SQL queries; understanding race conditions and concurrency issues Infrastructure/DevOps: Docker; configuring Nginx; Redis, RabbitMQ and task queues; Elasticsearch + Kibana; Prometheus + Grafana; understanding CDN; understanding L3/L7 DDoS protection principles; understanding proxy/reverse proxy Frontend: React; Vite; understanding native Webpack configuration; Tailwind CSS; Zustand; Axios; basic PixiJS knowledge; basic SEO understanding API/Integrations: Ability to understand and work with undocumented APIs; OAuth and basic 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 solution finding; 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 high-load system architecture; 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