Developed core backend features for the ahumadamob/springboot-calificaciones repository, focusing on foundational data management and enrollment workflows. Built a Teacher Management System by introducing a Docente entity with full CRUD operations, and established a Course Enrollment Management system through the Cursada entity, both structured with a controller-service-repository pattern. Leveraged Java, Spring Boot, and JPA to ensure clean architectural layering and maintainable code, setting the stage for future reporting and analytics. The work emphasized scalable RESTful API design and robust entity modeling, resulting in a backend ready for further testing and enhancement without addressing bug fixes during the development period.