Gleb Mashkanov delivered the TMS Data Layer and API Migration for the reportportal/service-api repository, focusing on establishing a unified and maintainable backend architecture. He migrated data access objects and restructured the data layer, introducing repositories and services to decouple data access from business logic. Using Java, Spring Boot, and JPA, Gleb implemented new API controllers supporting product versions, test cases, datasets, and manual launches, thereby expanding the Test Management System’s capabilities. His work enabled faster future feature delivery and improved maintainability, demonstrating depth in backend development and database management within a microservices and REST API development context.