Worked on the DefangLabs/defang repository, focusing on backend and CLI development using Go with a strong emphasis on reliability and testing. Delivered a key feature that enhanced service orchestration and authentication, introducing comprehensive unit tests and refactoring CLI components to improve error handling, retry logic, and observability. Addressed a CloudWatch Logs issue by refining filter pattern handling for empty strings, reducing defects in log management. In a subsequent phase, optimized continuous integration pipelines by implementing environment-aware logic to skip unnecessary user data fetches, resulting in faster, more stable CI runs and improved feedback loops for developers working with the CLI.