Roberto Blanco developed foundational backend features for the PowerMate and FunkoShop-Backend repositories, focusing on robust API and data management. He implemented device CRUD operations and order management groundwork in Java using Spring Boot and Spring Data JPA, emphasizing testability through dependency injection and isolated unit tests with Mockito. In FunkoShop-Backend, Roberto expanded order item handling with the DetailOrder domain, introduced monthly sales reporting, and enhanced user profile and address management. His work demonstrated depth in designing maintainable, testable architectures, improving data modeling, and aligning code quality across services, laying a solid foundation for future feature development and data-driven insights.