Worked on the h2oai/h2o-3 repository to enhance CI/CD automation by migrating the build pipeline from Harbor to AWS ECR, updating Jenkinsfile and Makefile to support reusable Docker image builds and streamline dependencies. Developed a multi-branch automated testing pipeline using Groovy and Shell, enabling branch-specific testing on Linux Docker agents. Introduced nightly merge automation to synchronize release branches with main, updating master build descriptions and improving release workflows. Refactored CI/CD logic to cancel stale multi-branch runs, increasing reliability and reducing wasted compute. Addressed repository configuration issues and deprecated outdated pipelines, demonstrating a methodical approach to DevOps and CI/CD optimization.