OpenAI
Software Engineer, Codex Core Agents
$230K–$385K
San Francisco +3 · Full-time · Posted Mar 26, 2026
- Location
- San Francisco
New York City
Seattle
London, UK
About the job
Build and operate production infrastructure that enables Codex agents to execute code, use tools, manage long-running tasks, and perform reliably at scale.
What you'll do
- Design sandboxed execution environments and infrastructure for testing and debugging model-generated code.
- Develop orchestration, state and memory systems for multi-step agent workflows.
- Optimize production performance and support model rollouts, capacity planning, and shared platform capabilities.
What they ask for
- Strong experience in distributed systems or infrastructure engineering.
- Experience building systems involving containers, sandboxing, or virtualization.
- Comfort working across backend systems, APIs, and developer tooling.
- Care about system reliability, performance, and security.
Nice to have
- Experience with code execution platforms, CI/CD systems, or build systems; experience coding in Rust.
- Familiarity with LLMs, agents, or tool-use frameworks; background in security engineering or isolation systems; experience building developer platforms, IDE tooling, or open source infrastructure.
Pay
$230K – $385K USD base salary
Tools
Rust
AI focus
Build infrastructure for AI agents, including safe code execution, tool use, orchestration, long-running tasks, and model rollouts.
Model-written summary · the original posting is authoritative