Have you had experience developing and interacting with individual microservices using NestJS?

Yes, experience working with microservices in NestJS includes creating separate services with clearly defined APIs and business logic. Thanks to its modular architecture and the use of TypeScript, NestJS makes it easy to separate functionality into independent services.

Interaction between microservices is usually implemented via HTTP REST API, gRPC, or message brokers (e.g., RabbitMQ, Kafka). NestJS provides built-in support for these protocols.

Example of a simple microservice in NestJS:

import { Controller, Get } from '@nestjs/common';

@Controller('users')
export class UsersController {
  @Get()
  findAll() {
    return [{ id: 1, name: 'John Doe' }];
  }
}

To interact between microservices, you can use NestJS client modules, for example:

import { ClientProxy, Client } from '@nestjs/microservices';

@Client({ transport: Transport.TCP })
client: ClientProxy;

// sending a message to another microservice
this.client.send('pattern', data).subscribe(response => {
  // handle response
});

Thus, NestJS simplifies the creation and integration of microservices thanks to its architecture and built-in tools.