What microservices have you developed? What exactly are these services?

In my Go development practice, I have created microservices for payment processing, user management, and analytics. For example, the payment service was responsible for receiving and validating transactions, integrating with external payment gateways, and storing transaction history. The user management service handled registration, authentication, authorization, and profile management. The analytics service collected and aggregated metrics on user activity and transactions to build reports and dashboards.

Each service was isolated, had its own database, and interacted with others via gRPC or REST API. This approach allowed scaling individual parts of the system and quickly implementing new features without affecting the entire platform.