Node.js of Any Complexity

Building scalable server-side platforms in JavaScript/TypeScript within the Node.js environment. Architecturally clean applications with NestJS (modular architecture, DI, DTO validation) or fast microservices with Fastify/Express. Working with databases via Prisma ORM, TypeORM or Mongoose (MongoDB). Implementing real-time two-way communication via WebSockets (Socket.IO), building the GraphQL server layer (Apollo Server), and task queues on BullMQ/Redis.