Briefly tell what you did at previous jobs, what features you implemented?

In my previous workplaces, I was involved in developing server applications in Go, including creating REST APIs and optimizing service performance. I implemented features such as:

• Authentication and authorization mechanism with JWT
• Integration with external payment systems
• Logging and monitoring system using Prometheus

For example, for one task, I developed a microservice that handled user requests and ensured high fault tolerance by using goroutines and channels for parallel processing.