Over a two-month period, contributed to zed-industries/livekit-rust-sdks and cryspen/libcrux by building features and addressing critical bugs in Rust. Developed dynamic server-controlled mute functionality for real-time audio tracks, enabling responsive control of participant streams. Enhanced participant management by exposing granular permissions through the FFI layer, allowing downstream applications to enforce per-participant capabilities with protocol buffers. In cryspen/libcrux, corrected AVX2 SIMD256Vector endianness handling and expanded test coverage to ensure cross-platform reliability. Focused on backend development, low-level programming, and performance optimization, consistently delivering CI-ready changes that improved real-time communication robustness and maintained backward compatibility for safe adoption.