Raul Soto modernized and hardened the security configuration for the DSpace/DSpace repository, focusing on improving maintainability and aligning with current Spring Security best practices. He replaced the deprecated AntPathRequestMatcher with PathPatternRequestMatcher, ensuring more robust and future-proof request matching. Raul refactored the security setup to use the HttpSecurity fluent API, resulting in clearer and more centralized security rules. Working primarily with Java and leveraging his expertise in backend development and Spring Security, he addressed technical debt and reduced risk from outdated patterns. The work delivered a maintainable, well-structured security configuration that strengthens the overall security posture of the application.