May 2026: Focused on stabilizing Airflow's MySQL-backed scheduler by fixing the incorrect application of the MySQL index hint in task instance selection, and adding regression tests. The patch improves reliability and performance of task scheduling in production, reducing query overhead and potential delays. Delivered in astronomer/airflow as commit 1193e5e29d371e66b16938aaab401847d9f67f68 (PR #66785), co-authored by nanaones. Demonstrated strong Python/SQL skills, test-driven development, and CI collaboration.

February 2026 monthly work summary for apache/airflow focusing on reliability and maintainability improvements in session cleanup. Implemented robust error handling in cleanup_session_middleware to prevent unhandled DB errors from surfacing as 500 responses, and improved observability and maintainability through logging enhancements and static checks.