Worked on stabilizing the build and release process for the HDRUK/gateway-api repository, focusing on backend reliability rather than feature development. Addressed a critical build failure by identifying and removing the problematic TestFederation.php file from the 1.21.0 release, which restored successful continuous integration runs and improved release readiness. Utilized PHP and Laravel to perform targeted codebase cleanup, reducing the risk of regressions and streamlining the deployment pipeline. The work emphasized maintaining a stable codebase and minimizing potential customer-impacting outages, demonstrating a methodical approach to release governance and technical debt management within a PHP and Laravel environment.