Have you worked with message broker systems?

Yes, my recent project involved working with message broker systems such as RabbitMQ, Apache Kafka, Azure Service Bus, etc.

Main points:

• Asynchronous message exchange — allows system components to be decoupled and ensures reliable message delivery.
• Publish/Subscribe (Pub/Sub) — the broker receives messages from senders and distributes them to subscribers.
• Message queues — provide ordered processing and load balancing.

Example in C# using RabbitMQ:

var factory = new ConnectionFactory() { HostName = "localhost" };
using(var connection = factory.CreateConnection())
using(var channel = connection.CreateModel())
{
    channel.QueueDeclare(queue: "task_queue", durable: true, exclusive: false, autoDelete: false, arguments: null);

    string message = "Hello World!";
    var body = Encoding.UTF8.GetBytes(message);

    var properties = channel.CreateBasicProperties();
    properties.Persistent = true;

    channel.BasicPublish(exchange: "", routingKey: "task_queue", basicProperties: properties, body: body);
    Console.WriteLine(" [x] Sent {0}", message);
}

This experience helps build scalable and fault-tolerant systems.