Principal Software Engineer, Infrastructure Security

Principal-level infrastructure security engineer designing and operating planet-scale authentication, access control, and key management systems protecting OpenAI's AI research and production environments.
- Own architecture and roadmap for core security services (authN/Z, policy enforcement, proxies, key management) from design through production operation.
- Design planet-scale security systems balancing security, reliability, latency, and developer ergonomics across hardware, operating systems, Kubernetes, networks, and CI/CD.
- Lead cross-functional launches with infrastructure and research teams, shaping interfaces, migration plans, and safe rollout strategies across large fleets.
- Build security primitives (identity, attestation, authorization, encryption key lifecycle, access mediation) that become platform building blocks.
- Leverage frontier models and agents to develop automation and detection tooling for identifying and mitigating risks in large-scale cloud and on-premises environments.
- Lead design reviews and threat models for major initiatives; mentor engineers across InfraSec and partner teams on engineering quality and secure-by-default practices.
- Requires strong distributed systems experience, proven track record operating critical security infrastructure at planet scale, and deep security principles expertise.
- Requires demonstrated ability to lead cross-team technical initiatives, expertise in large-scale cloud platforms (Azure, AWS, GCP), and excellent communication skills.

Principal-level infrastructure security engineer designing and operating planet-scale authentication, access control, and key management systems protecting OpenAI's AI research and production environments.
- Own architecture and roadmap for core security services (authN/Z, policy enforcement, proxies, key management) from design through production operation.
- Design planet-scale security systems balancing security, reliability, latency, and developer ergonomics across hardware, operating systems, Kubernetes, networks, and CI/CD.
- Lead cross-functional launches with infrastructure and research teams, shaping interfaces, migration plans, and safe rollout strategies across large fleets.
- Build security primitives (identity, attestation, authorization, encryption key lifecycle, access mediation) that become platform building blocks.
- Leverage frontier models and agents to develop automation and detection tooling for identifying and mitigating risks in large-scale cloud and on-premises environments.
- Lead design reviews and threat models for major initiatives; mentor engineers across InfraSec and partner teams on engineering quality and secure-by-default practices.
- Requires strong distributed systems experience, proven track record operating critical security infrastructure at planet scale, and deep security principles expertise.
- Requires demonstrated ability to lead cross-team technical initiatives, expertise in large-scale cloud platforms (Azure, AWS, GCP), and excellent communication skills.

OpenAI is a frontier AI research and product company, with teams working on alignment, policy, and security. We post specific opportunities at OpenAI that we think may be high impact. We do not necessarily recommend working at other positions at OpenAI. You can read concerns about doing harm by working at a frontier AI company in our career review on the topic, including concerns about OpenAI in particular. Note that there have also been concerns around OpenAI's HR practices.