Worked on stabilizing the CTST testing environment in the scality/Zenko repository by addressing dependency conflicts and lockfile instability. Focused on upgrading @types/node to version 24.12.0 and enforced the use of a frozen yarn.lock file to ensure deterministic installations, which improved the reliability of continuous integration and reproducibility of test outcomes. Resolved CI lint and build issues by managing dependencies with JavaScript and YAML, reducing maintenance risks for future updates. Demonstrated skills in CI/CD, dependency management, and testing, contributing to a more stable development workflow and ensuring consistent environments for ongoing and future engineering efforts.