During July 2025, Federico Macagno focused on backend reliability for the aws-mwaa/upstream-to-airflow repository, addressing a critical integration issue in the Databricks Hook. He updated the update_job_permission endpoint to remove the '/api' prefix, ensuring compatibility with the latest Databricks SDK and reducing integration errors for downstream DAGs. Federico implemented this fix using Python, emphasizing robust API integration and thorough testing. He also introduced a regression test to verify the endpoint’s correct behavior, which improved code quality and test coverage. This targeted work enhanced the stability of Databricks-related workflows, reflecting a careful and methodical engineering approach within the project.