Can you briefly describe what services the system consisted of and how they communicated with each other?

A typical system in Go consists of several services, each responsible for its part of the functionality. For example:

• API Gateway — accepts external requests, routes them to the appropriate services.
• Authentication Service — handles registration, login, session management.
• Business Logic — the main service implementing the core functions of the application.
• Data Storage Service — interacts with the database, cache.
• Queue/Message Service — for asynchronous task processing and communication between services.

Communication between services is usually implemented via HTTP REST API or gRPC for synchronous calls, as well as through message brokers (e.g., Kafka, RabbitMQ) for asynchronous event exchange.

To ensure fault tolerance and scalability, services can be deployed in containers and managed by orchestrators like Kubernetes.