In June 2025, Josh Shumway optimized the build system for the ROCm/TheRock repository by upgrading the composable_kernel submodule, focusing on reducing build times and improving developer productivity. He achieved this by enabling greater build parallelism and restructuring large build targets into smaller, more manageable source files. This approach streamlined the integration process and shortened feedback cycles for the development team. Josh utilized Git for submodule management and applied advanced build system optimization techniques to ensure smoother CI throughput. His work demonstrated a strong understanding of parallelization and dependency management, resulting in a more efficient and maintainable build infrastructure.