Full-Stack Developer (Node.js / React)

Full-Stack Developer (Node.js / React). Looking for a strong Full-Stack developer with backend/frontend, databases, networking, and high-load architecture. Tech: Node.js, Express, React, MySQL/PostgreSQL, WebSocket, Docker, etc.

Core stack: 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 Nginx setup 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 knowledge of PixiJS Basic understanding of SEO 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 set technical tasks for neural networks and verify results Security: Understanding SQL Injection and protection methods Checking type substitution and invalid input 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 principles and main networks: Bitcoin, TON, Ethereum/ERC, TRON Experience with non-standard APIs and integrations