Have you used a message exchange system or message broker in your projects?

Yes, I have used message brokers such as RabbitMQ and Apache Kafka to organize asynchronous data exchange between services. This helps to unload the system, increase scalability, and reliability.

For example, in a microservices architecture project, event messages (such as order creation) were sent to a queue, and other services subscribed to these events and processed them independently, which improved fault tolerance and allowed for more efficient load handling.