Please tell more about your first job from 2019 to 2021.

From 2019 to 2021, at my first job, I was involved in developing backend services in Go. The main tasks included:

• Designing and implementing REST APIs for internal and external clients.
• Optimizing the performance of services handling large volumes of data.
• Implementing microservice architecture and communication between services via gRPC.
• Writing unit and integration tests to ensure code quality.
• Working with containerization systems (Docker) and orchestration (Kubernetes).

During this time, I gained experience in building reliable and scalable systems, as well as in teamwork and using CI/CD processes.