Worked on enhancing the Vulkan backend stability for the shadPS4 repository, focusing on refining the device sorting logic to improve physical device selection for rendering. Addressed a critical bug by ensuring strict weak ordering and updating selection criteria based on API version support and device type, which reduced the likelihood of suboptimal device choices. Utilized C++ and the Vulkan API to implement and debug these changes, resulting in more reliable and performant rendering across supported environments. This work contributed to improved frame time consistency and overall stability, supporting both release and QA readiness for the project’s graphics programming components.