Staff Kernel & Compiler Performance Engineer

RadixArk; Palo Alto (CA); In loco; USD 200.000 - 400.000; Tempo pieno

Descrizione del lavoro

RadixArk is seeking a Member of Technical Staff — Kernel / Compiler / Communication to push the limits of performance for frontier AI systems. You will work at the lowest layers of the stack—kernels, runtimes, compilers, and communication libraries—to unlock maximum efficiency from modern accelerators and interconnects.

This deeply technical role involves solving performance challenges across thousands of GPUs, shaping the performance envelope of next-generation AI systems.

Competenze

• 5+ years of experience in systems, compiler, or performance engineering
• Strong expertise in CUDA or accelerator programming
• Deep understanding of GPU architecture and memory hierarchy
• Experience writing or optimizing high-performance kernels
• Strong background in compilers, runtimes, or code generation
• Experience with distributed communication libraries (NCCL, MPI, RCCL, etc.)
• Solid knowledge of networking and interconnect technologies
• Proficiency in C++ and Python
• Strong debugging and profiling skills at system level

Mansioni

• Design and implement high-performance kernels for AI workloads
• Optimize compiler and runtime stacks for ML systems
• Improve communication efficiency across large GPU clusters
• Reduce latency and increase throughput for distributed workloads
• Profile and eliminate system bottlenecks across the stack
• Collaborate with training and inference teams on performance optimization
• Develop tooling for profiling and performance analysis
• Contribute to long-term architecture for performance-critical systems
• Push the limits of hardware–software co-design

Conoscenze

CUDA / accelerator programming

GPU architecture

Kernels optimization

Compilers / runtimes / code generation

C++ & Python

System-level debugging & profiling

Distributed communication libraries

Strumenti

NCCL

MPI

RCCL

NVLink

InfiniBand

MLIR

Triton

TVM

XLA

Descrizione del lavoro

RadixArk is seeking a Member of Technical Staff — Kernel / Compiler / Communication to push the limits of performance for frontier AI systems. You will work at the lowest layers of the stack—kernels, runtimes, compilers, and communication libraries—to unlock maximum efficiency from modern accelerators and interconnects.

This deeply technical role involves solving performance challenges across thousands of GPUs, shaping the performance envelope of next-generation AI systems.