During February 2026, Frederik Kofoed focused on enhancing data integrity within the fivetran/fivetran_connector_sdk repository, specifically addressing a duplicate MAR issue in the Toast connector. He replaced a non-deterministic UUID with a deterministic hash to uniquely identify applied tax records, expanding the hash input set to minimize collision risk and improve data synchronization reliability. Working primarily in Python, Frederik also improved backend code quality by removing unused imports and resolving flake8 warnings, which stabilized continuous integration tests. His efforts strengthened partner data pipelines by reducing downstream discrepancies, demonstrating depth in API integration, backend development, and data synchronization practices.