Worked on enhancing multithreading reliability for cord management in the Esri/abseil-cpp repository, focusing on improving thread safety and data integrity in C++. Refactored core synchronization by replacing spinlocks with mutex locks in the global cords list, reducing the risk of deadlocks and clarifying concurrency semantics. Leveraged Snapshots and the DeleteQueue to strengthen synchronization, resulting in safer data paths and more maintainable code. Additionally, updated test infrastructure to use a configurable thread count, improving test readability and reducing flakiness. Demonstrated skills in C++ development, concurrent programming, and software engineering, with an emphasis on robust testing and thread safety practices.