AI Systems Engineer Codex Agents

AI Systems Engineer Codex Agents

Company

OpenAI

Conditions

6 days ago Salary: 230K - 385K

Skills

Candidate Availability

Required and preferred rules are kept separate and reflect the wording in the original posting.

About the Role

You will build agent harnesses and execution loops that interpret model outputs, use tools, execute code, and safely complete long-horizon tasks. You will develop sandboxing, orchestration, evaluation, experimentation, observability, and diagnostic systems while improving reliability, latency, cost, and safety.

Requirements

• Experience building or operating production distributed systems, infrastructure, developer tooling, sandboxing, virtualization, cloud platforms, or ML systems
• Experience with Rust, Python, APIs, agent orchestration, evaluations, logs, traces, inference behavior, and runtime constraints
• Experience with LLM applications, coding agents, evaluations, model deployment, inference, compiler or runtime performance, or developer platforms
• Knowledge of reliability, safety, performance, debuggability, and system abstractions
• Ability to debug ambiguous production failures and deliver durable fixes

Responsibilities

• Design and build agent harnesses and execution loops
• Build sandboxing, isolation, orchestration, state, and workflow infrastructure
• Develop evaluation, experimentation, and debugging systems
• Run ablations across prompts, interfaces, context, tools, and harness behavior
• Improve observability, profiling, and diagnostics across the agent stack
• Build shared primitives for faster, safer, and more reliable agents

Benefits

• Medical, dental, and vision insurance for employees and their families
• Employer contributions to Health Savings Accounts
• Health FSA, Dependent Care FSA, and commuter expense accounts
• 401(k) plan with employer match
• Paid parental, medical, and caregiver leave
• Flexible paid time off for exempt employees
• Paid company holidays and office closures
• Paid sick or safe time
• Mental health and wellness support
• Employer-paid basic life and disability coverage
• Daily office meals and eligible meal delivery credits
• Relocation support for eligible employees
• Charitable donation matching
• Wellness stipends
• Equity
• Performance-related bonuses for eligible employees

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