Arbaaz Ahmed contributed to openSUSE/open-build-service and dart-lang/sdk by enhancing reliability and deployment flexibility through C++, Ruby, and system programming. He improved user-facing error handling in request flows and prevented duplicate background job enqueues, reducing operational issues and streamlining backend processes. In dart-lang/sdk, he introduced an option to skip crash handler installation, supporting diverse deployment needs. Arbaaz also fixed a React state management bug in apache/airflow, ensuring the XCom edit modal reliably restored its state on reopen. His work demonstrated careful attention to maintainability, code quality, and user experience across both backend and frontend development contexts.