Software Engineer, Infrastructure Security

About this role

OpenAI is hiring a Security Software Engineer to design and build foundational security services protecting the company's GPU supercomputing clusters, multi-cloud infrastructure, and AI model environments. You'll architect production-grade systems like authentication platforms, access brokers, and key management infrastructure while partnering with infrastructure teams to embed security into high-performance compute at scale.

What you'll do

• Design and implement production security services including authentication systems, access brokers, secure proxies, and key management platforms
• Embed security into high-performance GPU clusters and infrastructure while enabling rapid model training and deployment
• Develop automation and detection tools to identify and mitigate risks across large-scale cloud and on-premises environments
• Drive high-impact security initiatives such as line-speed encryption, machine identity, and network isolation
• Lead design reviews and threat modeling to ensure new systems launch with strong security foundations
• Partner with infrastructure and research engineers to balance security with performance requirements

What they're looking for

• Software engineering (Python, Go, Rust, C/C++)
• Building and operating critical security infrastructure (auth, proxies, certificate/key management)
• Security principles, best practices, and vulnerability assessment
• Large-scale cloud platform security (AWS, Azure, GCP, multi-cloud)
• Container and orchestration security (Kubernetes, service meshes)
• Modern authentication/authorization standards (OIDC, mTLS, SPIFFE/SPIRE)
• Problem-solving and critical thinking
• Cross-functional communication and stakeholder management