Michał Kulig focused on backend security and platform modernization for the PSI-Polska/wildfly repository over a two-month period. He addressed critical vulnerabilities by upgrading dependencies, such as patching CVE-2024-7254 through a targeted protobuf update and remediating CVE-2025-23368 across WildFly core and Elytron integration. Michał also advanced the platform by updating Java compatibility to versions 17 and 18, ensuring support for newer language features and long-term maintainability. His work relied on Java, Maven, and XML configuration, demonstrating a methodical approach to vulnerability assessment and security management while maintaining system stability and readiness for future updates.