Contributed to the google/oss-rebuild repository by developing features that enhanced cross-ecosystem packaging reliability. Focused on backend development using Go, the work included improving PyPI wheel name inference to better handle diverse .dist-info naming conventions and extending NPM tarball URL classification to support prerelease versions. Addressed robustness in JAR metadata handling by implementing case-insensitive processing of manifest attributes and removing deprecated fields to prevent duplication. These changes reduced edge-case failures and streamlined CI/CD processes, reflecting a collaborative approach to compatibility across Python, Java, and JavaScript packaging. The contributions demonstrated depth in backend systems and attention to cross-language integration challenges.