During January 2026, Luogen worked on the apache/celeborn repository to enhance cross-version Flink client support by building a unified tiered shuffle logic. He established a new client-flink-common-tiered submodule and introduced a shim layer, enabling shared logic and streamlined verification across different Flink versions. By consolidating tests into a single suite, Luogen reduced code duplication and simplified ongoing maintenance. His work, implemented in Java and leveraging expertise in Flink, software architecture, and unit testing, laid a robust foundation for future enhancements. The changes focused on internal architecture, improving maintainability and accelerating the evolution of tiered shuffle features across releases.