Frontend: React.js / Next.js, React Native (Mobile), Flutter
Backend: Node.js, Python, FastAPI, WebSocket, Redis
Blockchain: Solidity, Ethers.js, Web3.js, Hardhat, EVM Chains
Database: PostgreSQL, MongoDB, Redis (caching)
AI/ML: Python, TensorFlow, OpenAI API, LangChain
Infrastructure: AWS, Docker, Kubernetes, CI/CD, Nginx
Security: JWT, 2FA, biometric auth, smart contract audits