•Lang: TypeScript everywhere
•Frontend: Next.js + React, Tailwind, shadcn/ui
•Mobile: React Native (Expo) / Flutter
•Backend: NestJS (Node), FastAPI (Python), Go
•DB & Cache: PostgreSQL + Prisma, Redis
•Auth: WebAuthn + Clerk/Auth0
•Infra: Docker, GitHub Actions, AWS, Cloudflare, Google Cloud
•Monitoring: Grafana, Sentry