During December 2025, Bastien Menissier developed a data interval override feature for manual DAG runs in the potiuk/airflow repository. He implemented end-to-end changes across the React-based frontend, updating the TriggerDAGForm to allow users to specify start and end dates for data intervals, and ensured the API payloads reflected these new fields. Bastien applied UI/UX design principles to polish the interface, including margin adjustments and form layout improvements. Working primarily with JavaScript and TypeScript, he delivered a cohesive integration that enhances operator control, supports reproducible testing, and improves data quality validation, demonstrating depth in both frontend engineering and user experience.