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Software Engineer, Codex Core Agents

San Francisco💼 Full-time🗓 2026-03-26 → 2026-09-26

Core

Design and operate the infrastructure that powers AI agents in production, focusing on sandboxed execution, orchestration, and stateful workflows.

Role type

Senior IC distributed systems engineer (AI infrastructure)

Builds

Execution environments, orchestration systems, and shared platform capabilities for AI agents

Domain

AI infrastructure, distributed systems, developer tooling

Deliverable

production ML models | infrastructure

Required skills

distributed systems, containerization/sandboxing, backend systems, API design, system reliability, performance optimization, security engineering

Preferred skills

code execution platforms, CI/CD systems, LLMs/agents, tool-use frameworks, security engineering, developer platforms

Technologies

containers, sandboxing, virtualization, APIs, distributed systems

Responsibilities

Design execution environments for AI agents with sandboxing and isolation; Develop systems for agent orchestration across multi-step workflows; Build infrastructure for running and debugging model-generated code; Create state and memory systems for long-running tasks; Optimize tokens, latency, reliability, and cost; Support model rollouts and capacity planning; Build shared platform capabilities for product and partner teams

Seniority

Senior, hands-on IC

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