Jan Luehe refactored the Base64 encoding utility in the apache/logging-log4j2 repository, replacing reflective encoding with direct usage of java.util.Base64. This change eliminated runtime reflection risks and reduced encoding overhead, resulting in a more stable and maintainable logging pipeline. By simplifying the encoding logic and preserving API compatibility, Jan improved both performance and readability, making future enhancements and onboarding more efficient. The work focused on Java development and code refactoring, with an emphasis on robust API integration. This targeted update strengthened the reliability of serialization and encoding paths, benefiting downstream systems that depend on consistent log formatting.