Senior Compiler Engineer

About Luminal

Making AI run fast on any hardware.

Tech

**Luminal** uses a search based approach to generate, tune, and verify GPU kernels so engineers do not have to hand write CUDA. ### Search based approach * Express computations in a small IR, then generate candidate kernels via equality saturation rewrite rules (tiling, unrolling, vectorization, memory layout). * Guide exploration with cost models and bandit style search to find the fastest valid kernels for a target GPU. * Compile and benchmark candidates on real hardware, enforce correctness with property tests and equivalence checks, and keep strict shape and dtype constraints. * Cache, version, and reuse the best kernels across models and deployments with full reproducibility. ### Tech stack * **Compiler and runtime:** Rust and egglog based compiler generating GPU kernels. Using a lightweight IR with e-graph style rewrites to search and benchmark kernels. * **Backends:** CUDA and Metal in production today. Other backends in progress.

The role

Luminal optimizes AI models to accelerate and simplify model deployment using a search-based compiler.The AI stack needs to be rethought from the ground up to achieve this. As demand for inference grows, teams will need to run models across a wider range of hardware, not just the platforms with the most mature software support. Luminal makes AI workloads faster, more portable, and easier to deploy by automatically optimizing models for the ideal hardware. Our mission is to make state-of-the-art AI production-ready on any compute platform. **We have already closed multiple contracts with non-Nvidia hardware platforms.**Luminal is backed by Y Combinator and Felicis as well as top-tier angels such as Paul Graham (founder of Y Combinator), Guillermo Rauch (founder of Vercel) and many others.### What You’ll Do* Design and build core compiler infrastructure in Rust* Build search-based optimization systems for discovering faster kernels* Develop backend code generation for multiple targets (NVIDIA, Trainium, AMD, TPU, etc.)* Implement compiler passes for fusion, scheduling, memory planning, and kernel selection* Profile real models, identify bottlenecks, and improve latency and throughput* Help shape Luminal’s engineering culture from the ground up### What we’re looking for* Experience with compiler frameworks: LLVM, MLIR, or other custom compilers* Hands-on experience with at least one of: PTX/SASS, GCN/RDNA assembly, or other GPU ISAs* Familiarity with ML compilers: torch.compile (or custom PyTorch backend), XLA, TVM, etc.### Nice to haves* Background in distributed systems or multi-device compilation* Experience with Egg/Egglog is a STRONG plus* Experience with Rust* Experience in developing and deploying AI models in production environments### Role DescriptionThis is a full-time on-site role for a Founding Compiler Engineer located in downtown San Francisco. You will be responsible for assisting the design of the core compiler. Day-to-day tasks will include writing CUDA kernels, conducting model performance reviews, and shitposting on social media.

Skills

• SASS
• CUDA