Requirements:
- Frontend: React.js / Next.js, TailwindCSS, TypeScript
- Mobile: React Native / Expo
- Backend: Node.js, NestJS or Express.js
- Database: PostgreSQL (with Prisma ORM), MongoDB
- Architecture: REST APIs / tRPC, Monorepo (Nx or Turborepo), Microservices
- DevOps & Cloud: Docker, AWS (EC2, S3, IoT Core, Lambda), GitHub Actions
- Bonus: D3.js or Recharts for data visualization, MQTT protocols, MQTT.js
