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Senior/Staff Software Engineer

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Senior/Staff Software Engineer in USA new

  • Foster City, CA

Responsibilities

  • Lead design, implementation, and operation of training performance optimizations for VLM, VLA, and foundation-model training.
  • Own the technical strategy and multi-quarter roadmap for reinforcement-learning frameworks and performance optimization.
  • Profile and diagnose throughput bottlenecks across compute, compiler, framework, and cluster-networking layers.
  • Partner with ML researchers, data engineers, and hardware engineers on requirements and architectural decisions for large-scale training infrastructure.
  • Build custom kernels and benchmarks to measure and validate performance improvements.
  • Mentor engineers and raise the team’s technical bar through design reviews and best practices.

Requirements

  • 7+ years of total experience, including 4+ years working on large-scale model training platforms and leading projects end to end.
  • Deep experience with distributed training frameworks such as Megatron-LM and TorchTitan, and efficient use of GPU or accelerator clusters at scale.
  • Experience with RL frameworks such as Verl and MILES and algorithms including GRPO and PPO.
  • Experience with collective communication libraries such as NCCL and optimizing communication/compute overlap in multi-node training.
  • Strong command of profiling tools including NVIDIA Nsight, PyTorch Profiler, or XLA/JAX profiling.
  • Proficiency in Python or C++.
  • Experience with ML compilers, performance tooling, or hardware/software co-design involving GPU, TPU, or accelerator architectures.
  • Ability to influence across teams and communicate technical tradeoffs to researchers and engineers.

Salary: $254k - $350k/yr

Zoox

Zoox is transforming mobility-as-a-service by developing a fully autonomous, purpose-built fleet designed for AI to drive and humans to enjoy.

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