Worked on the ERGO-Code/HiGHS repository to enhance concurrency safety in the solver’s multi-threaded factorization process. Addressed a race condition by refactoring the stop flag from a standard boolean to an atomic boolean, ensuring safe access and modification across threads. This change improved the stability and reliability of parallel execution, reducing the risk of inconsistent stop signaling during concurrent runs. The solution was implemented in C++ with a focus on multithreading and software engineering best practices. All modifications were clearly documented at the commit level, supporting maintainability and reproducibility for future development and debugging within the project.