Have you had experience working with a standalone service or module in a system?

Yes, I have experience developing a standalone service in Python that performed specific business logic and interacted with the main system via API. Such a service was structured as a separate module with its own environment and database, allowing it to be scaled and updated independently of the main application.

For example, I created a microservice for processing payments, which received requests via REST, performed validation, and interacted with external payment gateways. This helped to offload the main application and increase the system's fault tolerance.

I used frameworks like Flask or FastAPI for quick API development, as well as Docker for containerizing the service.