Pol Rk enhanced developer experience and CI reliability across the ydb-platform/ydb-go-sdk and virattt/servers repositories by building containerized development environments and centralizing chaos testing in CI workflows. Using Docker, Docker Compose, and TypeScript, Pol migrated chaos testing into the main CI pipeline, improving maintainability and log analysis. For ydb-go-sdk, Pol introduced DevContainer-based setups and comprehensive onboarding documentation, streamlining local development and reducing setup friction for new contributors. In virattt/servers, Pol refactored code for readability and updated package versions to ensure up-to-date features. The work demonstrated depth in DevOps, CI/CD, and technical writing, aligning with business productivity goals.