Worked on stabilizing the build pipeline for the denoland/chromium_build repository by addressing a critical issue affecting Linux UBSan Tests. Applied a disciplined rollback strategy, using targeted bisecting to identify and revert a problematic commit within a larger clang and Rust LLVM roll. This approach restored CI reliability and ensured trunk stability, minimizing downtime and reducing investigation time for future failures. Leveraged expertise in build systems, CI/CD processes, and version control to maintain a robust development workflow. Utilized both Python and Rust to navigate complex build dependencies, demonstrating a methodical approach to risk mitigation and continuous integration maintenance within the project.