Worked extensively on the shadps4-emu/ext-SDL and libsdl-org/SDL repositories, delivering cross-platform GPU rendering features and backend optimizations. Developed and integrated Metal, Vulkan, and Direct3D 12 support, focusing on low-level graphics programming, performance optimization, and robust build systems. Addressed platform-specific challenges by implementing conditional compilation, memory management improvements, and validation checks for graphics capabilities. Enhanced documentation to clarify driver compatibility and streamlined code through targeted cleanup and refactoring. Used C, C++, and HLSL to implement features such as alpha-to-coverage, unrestricted texture-buffer copy pitch, and texture format support, improving rendering reliability and portability across iOS, Windows, and macOS.