During December 2025, this developer focused on the apache/flink-cdc repository, addressing a critical data integrity issue in the MySQL CDC Connector. They engineered a fix for data loss risks that could occur during checkpoint restores in bulk DML operations, ensuring correct handling of binlog offset comparisons when events and rows are skipped. Their approach included implementing comprehensive regression tests to validate the solution and prevent future issues. Working primarily with Java and leveraging backend development and unit testing skills, the developer improved the reliability of CDC streaming and enhanced the safety of checkpointed restores, demonstrating strong attention to production stability.