Middleware Development Engineer

About This Role

• Our team is building the offloading runtime that powers heterogeneous compute across GPUs and CPUs in the LLVM ecosystem.
• We're developing liboffload-a modern C API and implementation that sits beneath languages and frameworks like SYCL and OpenMP, bridging to driver-level backends (Level Zero, CUDA, HIP/ROCm, OpenCL) and enabling highperformance execution on diverse hardware.
• Translation: we get to design core runtime APIs, experiment with cuttingedge GPU features, and ship upstream code that others will build on for years.
• And this is your chance to do the same.
• Liboffload builds on proven OpenMP offload infrastructure in LLVM and evolves it into a generalpurpose runtime that language runtimes plug into.
• Key Responsibilities Design and implement runtime APIs in liboffload.
• Build and evolve backends/adapters that target driver-level stacks (Level Zero, CUDA, HIP/ROCm, OpenCL), and modernize features inherited from libomptarget plugins to meet SYCL and OpenMP needs.
• Contribute upstream across LLVM: liboffload, libomptarget plugins, offload utilities, and SYCL runtime integration paths. writing code, reviews, and docs alongside the community.
• Collaborate across the stack: work with compiler (Clang/LLVM IR/SPIRV), runtime (SYCL/OpenMP), and driver teams to implement new features.
• Engage with the community: present design proposals, participate in reviews and community calls, and help document best practices for language implementers on top of liboffload.