Jendrik focused on enhancing CI/CD reliability and test infrastructure for the JabRef/jabref and hiero-ledger/hiero-consensus-node repositories. He integrated TestLens into the JabRef CI pipeline using GitHub Actions and Gradle, refactoring workflows to promote maintainability and shared configuration. For hiero-consensus-node, Jendrik upgraded the build system with Gradle plugin improvements and introduced a module-info.java to prepare for future modularization. He also improved test observability by implementing partitioned XML coverage reporting and refining Log4j initialization for better resource handling during unit testing. His work demonstrated depth in build automation, Java and Kotlin development, and robust testing framework integration.