During October 2025, William Bland focused on backend development for the ROCm/pytorch repository, addressing a reliability issue in composite backend availability checks. He enhanced the is_backend_available function to correctly parse and validate composite backends, such as device:backend, ensuring each underlying backend is properly checked. To improve maintainability and clarity, William introduced a dedicated helper function, _check_single_backend_availability, which streamlined per-backend validation logic. Working primarily in Python and leveraging his expertise in distributed systems, he improved the robustness of backend configuration, reducing false negatives for composite setups. This work demonstrated depth in backend reliability and maintainable code design within complex systems.