During July 2025, Federico Macagno focused on backend reliability for the aws-mwaa/upstream-to-airflow repository, addressing a critical integration issue with the Databricks Hook. He identified and resolved a bug in the update_job_permission endpoint by removing the outdated '/api' prefix, ensuring compatibility with the latest Databricks SDK. Federico reinforced this fix with a targeted regression test, improving code quality and reducing the risk of runtime errors for downstream DAGs. His work leveraged Python and emphasized API integration and robust testing practices. While the scope was limited to a single bug fix, the solution demonstrated careful attention to stability and maintainability.