Host Systems Software Engineer

Responsibilities

• Design, implement, and debug host-side systems software for AI infrastructure, including Linux kernel drivers and userspace components
• Build and optimize software paths for high-throughput, low-latency communication, including RDMA and networking functionality
• Develop software around PCIe, DMA, NICs, accelerators, and memory movement
• Bring up new hardware platforms and diagnose complex issues across kernel, firmware, and hardware boundaries
• Build tooling for integration, testing, diagnostics, observability, and performance characterization
• Collaborate with hardware and networking teams to define interfaces and integrate new capabilities

Requirements

• Experience building low-level or performance-critical systems software
• Strong programming skills in C or C++
• Proficiency using Python and Linux tooling for automation and debugging
• Strong Linux systems fundamentals and ability to debug across hardware/software boundaries
• Hands-on experience in areas such as Linux kernel drivers, kernel networking, RDMA, PCIe, DMA, or high-performance I/O
• Experience owning complex software projects from design through validation

Preferred Qualifications

• Experience developing Linux kernel drivers or OS-level performance-critical components
• Familiarity with RDMA, RoCE, ibverbs, or congestion-control concepts (ECN, DCQCN)
• Experience with PCIe, DMA, peer-to-peer communication, SR-IOV, IOMMU, or dma-buf
• Experience bringing up accelerators, NICs, SoCs, or custom hardware platforms
• Experience profiling and optimizing high-throughput, low-latency systems
• Familiarity with Rust for systems programming

About the Company

OpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artificial intelligence benefits all of humanity.