Software Engineer, Codex Core Agents

The Codex Core Agent team builds the kernel of Codex. We own making the agent better, accelerating research, and making those improvements real in production for our users. This role focuses on building infrastructure that powers Codex agents in production, including sandboxed execution, orchestration, stateful workflows, app-server and SDK boundaries, and model rollouts.

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