Worked on the PSI-Polska/wildfly repository, focusing on backend security and platform modernization over a two-month period. Addressed critical vulnerabilities by upgrading dependencies, including patching protobuf to remediate CVE-2024-7254 and applying a security fix for CVE-2025-23368 across WildFly core and Elytron integration. Enhanced long-term maintainability by updating the Java compatibility to versions 17 and 18, aligning with newer WildFly core requirements. Leveraged Java, Maven, and XML configuration to ensure stable integration and compatibility with existing workloads. Prioritized security management and vulnerability assessment, delivering targeted fixes without introducing functional changes to application code or disrupting platform stability.