Worked on the matrix-org/matrix-rust-sdk repository to enhance cross-language interoperability by enabling enums to serve as HashMap keys within Uniffi bindings. Focused on exporting Eq and Hash traits for specific enums, such as TagName and TimelineEventType, this effort allowed these types to be used as keys in HashMap-backed structures like Tag and RoomPowerLevels. The approach improved the stability and usability of Rust FFI, making it possible for languages like C++ to efficiently interact with Uniffi-generated bindings. The work demonstrated strong skills in Rust, FFI, and enum design, addressing interoperability challenges without introducing new bugs during the development period.