Worked on the astronomer/airflow repository to implement configurable endpoint support for the Alibaba OSS provider, enabling dynamic selection of endpoints and supporting multi-region deployments. Enhanced the task handler’s log reading functionality to improve the reliability and observability of log processing during job execution. Utilized Python for backend development, incorporating MagicMock-based unit tests to validate endpoint configurations and strengthen test coverage. This approach reduced the risk of configuration-related issues in production and improved the flexibility of Alibaba OSS integration. The work focused on robust backend engineering, emphasizing mocking and unit testing to ensure reliable data ingestion workflows and maintainable code.