Software Engineer, Codex Core Agents (AI Engineering)

TL;DR

Software Engineer, Codex Core Agents (AI Engineering): Building the infrastructure that powers Codex agents in production, focusing on systems that let models safely execute code, interact with tools, and complete long-running tasks. Focus on distributed systems, developer tooling, and AI, building primitives that make Codex faster, safer, more reliable, and easier for the rest of the organization to build on.

Location: San Francisco, New York City, Seattle, and London, UK

Salary: $230K – $325K + Offers Equity

Company

OpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artificial intelligence benefits all of humanity.

What you will do

• Design and build execution environments for AI agents, including sandboxing, isolation, and reproducibility.
• Develop systems for agent orchestration across multi-step, tool-using workflows.
• Build infrastructure for running, testing, and debugging code generated by models.
• Create state and memory systems that allow agents to persist context across long-running tasks.
• Optimize tokens, latency, reliability, and cost across Codex’s production fleet.
• Build shared platform capabilities that unblock product teams, partner teams, and open source Codex.

Requirements

• Have strong experience in distributed systems or infrastructure engineering.
• Have built systems involving containers, sandboxing, or virtualization.
• Are comfortable working across backend systems, APIs, and developer tooling.
• Care deeply about system reliability, performance, and security.
• Enjoy working on ambiguous, zero-to-one problems.
• Want to help build the systems that turn model capability into a dependable software engineering agent.

Nice to have

• Experience with code execution platforms, CI/CD systems, or build systems.
• 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.

Culture & Benefits

• AI is an extremely powerful tool that must be created with safety and human needs at its core.
• Committed to providing reasonable accommodations to applicants with disabilities.
• 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.