Worked on stabilizing XDR enum serialization in the FirebirdSQL/firebird repository by addressing undefined behavior related to strict aliasing. Focused on backend development and systems programming using C++, the work involved introducing a type-safe template for xdr_enum that supports any enum type, replacing reinterpret_cast with static_cast throughout the protocol handling layer. This approach reduced undefined behavior and improved cross-compiler portability, enhancing the reliability of distributed transaction serialization. The changes also generalized enum handling, allowing safer extension without modifying call-sites. Overall, the contribution strengthened protocol robustness and reduced compiler warnings, reflecting careful code refactoring and attention to maintainability.