Staff Software Engineer - Genai Performance and Kernel

Databricks Databricks · Data AI · San Francisco, CA · Engineering - Pipeline

Staff Software Engineer focused on optimizing GPU kernels for GenAI inference, involving low-level compute, performance tuning, and integration with ML systems. The role requires deep expertise in GPU architecture and optimization techniques, with a focus on shipping high-performance production software.

What you'd actually do

  1. Lead the design, implementation, benchmarking, and maintenance of core compute kernels (e.g. attention, MLP, softmax, layernorm, memory management) optimized for various hardware backends (GPU, accelerators)
  2. Drive the performance roadmap for kernel-level improvements: vectorization, tensorization, tiling, fusion, mixed precision, sparsity, quantization, memory reuse, scheduling, auto-tuning, etc.
  3. Integrate kernel optimizations with higher-level ML systems
  4. Build and maintain profiling, instrumentation, and verification tooling to detect correctness, performance regressions, numerical issues, and hardware utilization gaps
  5. Lead performance investigations and root-cause analysis on inference bottlenecks, e.g. memory bandwidth, cache contention, kernel launch overhead, tensor fragmentation

Skills

Required

  • Deep hands-on experience writing and tuning compute kernels (CUDA, Triton, OpenCL, LLVM IR, assembly or similar sort) for ML workloads
  • Strong knowledge of GPU/accelerator architecture: warp structure, memory hierarchy (global, shared, register, L1/L2 caches), tensor cores, scheduling, SM occupancy, etc.
  • Experience with advanced optimization techniques: tiling, blocking, software pipelining, vectorization, fusion, loop transformations, auto-tuning
  • Familiarity with ML-specific kernel libraries (cuBLAS, cuDNN, CUTLASS, oneDNN, etc.) or open kernels
  • Strong debugging and profiling skills (Nsight, NVProf, perf, vtune, custom instrumentation)
  • Experience reasoning about numerical stability, mixed precision, quantization, and error propagation
  • Experience in integrating optimized kernels into real-world ML inference systems; exposure to distributed inference pipelines, memory management, and runtime systems
  • Experience building high-performance products leveraging GPU acceleration
  • Excellent communication and leadership skills — able to drive design discussions, mentor colleagues, and make trade-offs visible

Nice to have

  • published in systems/ML performance venues (e.g. MLSys, ASPLOS, ISCA, PPoPP)
  • experience with custom accelerators or FPGA
  • experience with sparsity or model compression techniques

What the JD emphasized

  • own the design, implementation, optimization, and correctness of the high-performance GPU kernels
  • lead development of highly-tuned, low-level compute paths
  • push the state-of-the-art in inference performance at scale
  • shipping performance-critical, high-quality production software

Other signals

  • GPU kernels
  • inference stack
  • performance optimization
  • low-level compute
  • ML researchers