AI Systems Engineer, Codex Agents at OpenAI
- Company: OpenAI
- Location: San Francisco
- Employment type: Full-time
- Salary: $230K – $385K • Offers Equity
- Posted: 2026-05-15
About the role
AI Systems Engineer - Codex Core Agents About The Team The Codex Core Agents team builds the agent harness that turns model capability into real-world action. We own the systems around the model: prompting and interpreting model outputs, executing actions safely in real environments, and feeding production experience back into better models and better agent behavior. This team sits close to research and works across the stack: harness, model interaction, inference, sandboxed execution, orchestration, evals, production reliability, and the performance envelope around tokens, latency, cost, capacity, and quality. The harness is open source and increasingly part of how models are trained and evaluated, making this one of the highest-leverage layers in Codex. About The Role We’re looking for engineers to build the AI systems that make Codex agents dependable in production.…
Apply on OpenAI's official careers page: https://jobs.ashbyhq.com/openai/de06790a-7243-4e33-a6f1-e7bd34009588