During February 2025, Andreas focused on backend development for the apache/tomcat repository, addressing a critical logging inconsistency in the Http2UpgradeHandler component. He resolved a bug where log messages alternated between info and debug levels by centralizing the logging logic through a static UserDataHelper, ensuring consistent output during HTTP/2 upgrade flows. This Java-based solution reduced log noise and improved the clarity of operational logs, making debugging and maintenance more efficient. By aligning the fix with the project’s traceability standards, Andreas enhanced the reliability of the upgrade pathway, demonstrating depth in Java and backend engineering within a complex codebase.