Over a two-month period, contributed to backend development on facebook/fbthrift and facebook/sapling, focusing on memory-optimized Rust enum handling and safer cross-language data interchange. Leveraging Rust and C++, introduced annotations and adapters in Thrift code generation to reduce enum memory footprint and unify adapter logic, while maintaining wire-format compatibility with C++. Enhanced type safety by implementing validated enum construction methods and improving error handling, particularly across Rust and Python bridges. Expanded test coverage and aligned code generation templates, resulting in more robust, maintainable code. The work emphasized type safety, trait implementation, and error handling to support long-term reliability and maintainability.