Worked on enhancing temporary directory management in the payara/Payara and vespa-engine/vespa repositories by standardizing temp-dir creation with Java NIO. Refactored critical code paths to use Files.createTempDirectory, replacing custom implementations and reducing boilerplate. This approach improved reliability, error handling, and maintainability, while enabling safer parallel operations and cleaner API surfaces. The updates in both repositories focused on modernizing file I/O practices and simplifying API signatures, which mitigated temp-dir related failures and streamlined future enhancements. Demonstrated strong skills in Core Java, Java NIO, and refactoring, delivering targeted improvements that contributed to cross-repository consistency and more robust codebases.