What services have you managed to develop from scratch?

I have had to write several services from scratch in Go, for example:

• REST API for an internal microservice that handled requests from the frontend and interacted with the database.
• A service for processing message queues from Kafka, which performed asynchronous data processing and stored the results.
• A tool for monitoring and collecting metrics from various system components, with subsequent aggregation and sending to a visualization system.

In each of these projects, I was involved in architecture, library selection, coding, and CI/CD setup. This experience allows me to create reliable and scalable services considering business requirements and technical constraints.