Worked on the PeerDB-io/peerdb repository to enhance the reliability of QRep partitioning in PostgreSQL replication workflows. Addressed a bug where uppercase watermark column names caused failures when snapshotNumPartitionsOverride was set, by updating the GetQRepPartitions logic to properly quote column names and preserve case sensitivity. This targeted fix reduced runtime errors and improved the stability of partitioned replication, especially in environments with mixed-case database schemas. The work involved backend development using Go and focused on database interaction and query correctness. The approach demonstrated attention to detail in handling SQL edge cases and contributed to more robust data replication processes.