Host Systems Software Engineer

About this role

OpenAI seeks a systems software engineer to design and build host-side software for custom AI infrastructure, focusing on kernel drivers, high-performance I/O, and networking. You'll work across hardware and software boundaries to optimize and bring up next-generation AI systems from low-level interfaces through production deployment.

What you'll do

• Design and implement Linux kernel drivers and userspace components for AI infrastructure
• Optimize software for high-throughput, low-latency communication including RDMA and networking
• Develop software for PCIe, DMA, network interfaces, and accelerator device interaction
• Bring up new hardware platforms and diagnose cross-layer issues in kernel, firmware, and hardware
• Build tooling for integration, testing, diagnostics, and performance characterization
• Collaborate with hardware, networking, and external vendor teams on platform integration

What they're looking for

• C/C++ programming
• Linux kernel development and systems fundamentals
• RDMA, RoCE, and kernel networking
• PCIe, DMA, and I/O subsystem knowledge
• Hardware platform bring-up and debugging
• Python and Linux automation tooling
• Performance optimization and profiling
• Rust (preferred)