Worked on enhancing Python-C interoperability within the amzn/rdma-core repository, focusing on maintaining compatibility with evolving Cython standards. Addressed a critical issue by updating the PD object’s return type in the pyverbs module to uintptr_t, ensuring that object pointer semantics aligned with Cython 3.x requirements and preventing potential runtime errors. This work required a strong understanding of low-level programming and Python C extensions, as well as proficiency in Cython. The contribution centered on bug resolution rather than feature development, reflecting a targeted approach to maintaining stability and compatibility in mixed-language codebases that rely on precise memory and type management.