Worked on the checkstyle/checkstyle repository to deliver a CI/CD infrastructure upgrade focused on automation and code quality. Introduced a Buildkite-based pipeline using YAML configuration and Maven to automate builds and enforce validation steps. Integrated Checkstyle and Spotless into the continuous integration process, ensuring that every pull request is subject to consistent code quality checks. Updated the spellchecker configuration to recognize Buildkite-specific terminology, reducing unnecessary noise in validation reports. By versioning the CI configuration and related validation steps, improved the feedback loop and reproducibility of builds. The work emphasized maintainable automation and reliable quality gates using CI/CD and Maven expertise.