Worked on enhancing the ragflow data pipeline within the infiniflow/ragflow repository by implementing incremental synchronization features for MySQL and PostgreSQL sources. Focused on backend development using Python to wire incremental sync metadata through the core connector, while also extending the frontend in TypeScript to allow users to configure ID, timestamp, and metadata columns. This approach improved data consistency and configurability, ensuring that document updates respected user-defined columns and time ranges. The enhancements reduced the need for full-sync runs, increased data accuracy, and enabled safer, more efficient incremental replication for downstream systems, demonstrating strong backend and database management skills.