AI & Machine LearningDirect Ashby career site

Host Systems Software Engineer

Location: San Francisco, CA (Remote) · On-site
Job type: Full-time
Level: Lead / Staff
Listed: 30 days ago

Skills & highlights for this role

Linux kernel drivers
C
C++
PCIe
RDMA

Also useful

Rust
ibverbs
DCQCN
IOMMU
dma-buf

About the Role

We’re looking for an experienced systems software engineer to help define and build the host software stack for our custom next-generation AI systems. You will work close to the hardware on performance-critical software, including Linux kernel drivers, high-throughput I/O paths, and system-scale networking and RDMA.

This role spans architecture, implementation, platform bring-up, debugging, and performance optimization. You will work across hardware and software boundaries to make new systems usable end to end, from low-level device interfaces through userspace tooling and production validation.

In this role you will

Design, implement, and debug host-side systems software for AI infrastructure, including Linux kernel drivers and supporting userspace components.
Build and optimize software paths for high-throughput, low-latency communication, including RDMA and related networking functionality.
Develop software around PCIe, DMA, NICs, accelerators, memory movement, and device interaction.
Bring up new hardware platforms and diagnose complex issues across kernel, firmware, networking, and hardware boundaries.
Build tooling for integration, testing, diagnostics, observability, qualification, and performance characterization.
Collaborate with hardware, networking, and platform teams to define interfaces and integrate new capabilities.
Work with external vendors where needed to integrate technologies and drive issues to resolution.
Contribute across the systems software stack as the platform and team evolve.
Help shape the technical direction and engineering practices for a growing systems software stack.

You might thrive in this role if you have

Experience building low-level or performance-critical systems software.
Strong programming skills in C or C++, with proficiency using Python and Linux tooling for automation and debugging.
Strong Linux systems fundamentals and the ability to debug across hardware and software boundaries.
Hands-on experience in at least one relevant area, such as Linux kernel drivers, kernel networking, RDMA, PCIe, DMA, NIC software, accelerator software, or high-performance I/O.
Experience owning complex software projects from design through implementation, bring-up, and validation.
Ability to thrive in ambiguity, work across subsystem boundaries, and build systems from scratch.
Strong cross-functional communication skills.

Preferred Qualifications

Experience developing Linux kernel drivers or other OS-level performance-critical components.
Familiarity with RDMA or RoCE, ibverbs, kernel networking, or congestion-control concepts such as ECN and DCQCN.
Experience with PCIe, DMA, peer-to-peer communication, SR-IOV, IOMMU, dma-buf, or related accelerator and I/O subsystems.
Experience bringing up accelerators, NICs, SoCs, or custom hardware platforms.
Experience profiling and optimizing high-throughput, low-latency systems.
Familiarity with Rust or experience using Rust for systems programming.

Additional information

To comply with U.S. export control laws and regulations, candidates for this role may need to meet certain legal status requirements as provided in those laws and regulations.

About the Team

OpenAI’s Hardware organization develops AI-native silicon and system-level solutions for the unique demands of advanced AI workloads. Building on efforts like Jalapeño, the team is developing future generations of AI-native silicon and tightly integrated systems to power the next generation of frontier models. By co-designing chips, systems, tools, and methodologies, the team helps deliver faster, more efficient, and production-ready hardware for OpenAI’s supercomputing platform.

About OpenAI

OpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artificial intelligence benefits all of humanity. We push the boundaries of the capabilities of AI systems and seek to safely deploy them to the world through our products. AI is an extremely powerful tool that must be created with safety and human needs at its core, and to achieve our mission, we must encompass and value the many different perspectives, voices, and experiences that form the full spectrum of humanity.

To notify OpenAI that you believe this job posting is non-compliant, please submit a report through this form No response will be provided to inquiries unrelated to job posting compliance.

Equal opportunity and legal notices

At OpenAI, we believe artificial intelligence has the potential to help people solve immense global challenges, and we want the upside of AI to be widely shared. Join us in shaping the future of technology.

We are an equal opportunity employer, and we do not discriminate on the basis of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability, genetic information, or other applicable legally protected characteristic.

For additional information, please see OpenAI’s Affirmative Action and Equal Employment Opportunity Policy Statement

Background checks for applicants will be administered in accordance with applicable law, and qualified applicants with arrest or conviction records will be considered for employment consistent with those laws, including the San Francisco Fair Chance Ordinance, the Los Angeles County Fair Chance Ordinance for Employers, and the California Fair Chance Act, for US-based candidates.

For unincorporated Los Angeles County workers: we reasonably believe that criminal history may have a direct, adverse and negative relationship with the following job duties, potentially resulting in the withdrawal of a conditional offer of employment: protect computer hardware entrusted to you from theft, loss or damage; return all computer hardware in your possession (including the data contained therein) upon termination of employment or end of assignment; and maintain the confidentiality of proprietary, confidential, and non-public information.

In addition, job duties require access to secure and protected information technology systems and related data security obligations.

We are committed to providing reasonable accommodations to applicants with disabilities, and requests can be made via this link

Read the original posting

From OpenAI's careers page, first listed on Rolev.ai on October 10, 2026. Rolev.ai is not the employer.

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Common questions

Where is the Host Systems Software Engineer job at OpenAI located?

Yes, this Host Systems Software Engineer opening at OpenAI is listed as San Francisco, CA (Remote) (On-site). Always check OpenAI's application page for specific state eligibility or relocation policies.

What qualifications are required for Host Systems Software Engineer at OpenAI?

For the Host Systems Software Engineer role, OpenAI highlights experience with Linux kernel drivers, C, C++, PCIe, RDMA. Rolev.ai can score your existing resume against these requirements and show any skill gaps before you apply.

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