Worked on stabilizing build systems for the Shopify/grpc repository, focusing on cross-compatibility and portability in C++ environments. Addressed a root-cause build error by delivering a targeted header compatibility fix, replacing stddef.h with cstddef in ref_counted_ptr.h to support std::nullptr_t with libc++ modules in Chromium builds. This change reduced CI build failures and improved cross-module stability, laying the groundwork for broader libc++ module support. Although no new features were shipped, the work enabled safer and faster feature delivery in future sprints. Utilized expertise in C++ and build systems to enhance reliability and maintainability across diverse development environments.