Senior GPU Kernel/CUDA Engineer for Exascale AI Infra

SpaceXSI is building one of the world's largest AI supercomputers, and the Compute Infrastructure team will own the raw GPU cluster and the platform layer that runs on top of it. You will work across the full stack—from low-level GPU kernel optimizations to large-scale orchestration—to speed up Grok's training and AI progress. The role combines hardcore supercompute with compute infrastructure, offering high impact, collaboration with AI researchers, and a path to optimize for both memory-bound