Developed end-to-end document management capabilities across the bena-sudo/rag2daw2025 and bena-sudo/rag2daw2025frontend repositories, focusing on both backend and frontend integration. Implemented RESTful APIs using Java and Spring Boot, introducing CRUD endpoints, enum-based status validation, and multipart file handling with DTO refactoring for improved data integrity. On the frontend, built a responsive Angular document editing form with reactive forms, HTML/CSS templating, and service methods for file operations. Enhanced error handling, CORS configuration, and test coverage contributed to greater reliability and maintainability. The work streamlined document lifecycles and enabled faster onboarding through clear interfaces and robust validation mechanisms.