Worked on performance, reliability, and logging improvements across telegramdesktop/tdesktop and fzyzcjy/flutter_rust_bridge. Delivered startup and IO optimizations in C++ for tdesktop, including faster emoji map refresh, accelerated log rotation, and improved UI responsiveness by deferring heavy operations and stabilizing chat list behavior. Enhanced URL handling to ensure command-line t.me links are processed reliably. In Rust, consolidated the logging subsystem for Flutter Rust Bridge user utilities, introducing configurable log levels, modular initialization APIs, and formatting cleanup to improve observability and cross-platform maintainability. Demonstrated depth in backend development, system programming, and performance optimization through targeted, maintainable engineering solutions.