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Codex Jobs in Los Angeles, CA (NOW HIRING)

PlayStation Global

Senior 3D UI Artist

Los Angeles, CA · On-site

Codex Image Population - Capture and deliver in-game images for all Codex categories, including Gear, Bestiary entries, and Codex Category Thumbnails, ensuring consistency of framing, lighting, and ...

YO AI Labs

Analytics Expert - Remote

Los Angeles, CA · Remote

$30 - $80/hr

Test AI agents such as ChatGPT Work, Codex, and Claude Cowork in analytics workflows. * Identify errors, inconsistencies, and opportunities for improvement. * Document findings and provide structured ...

YO AI Labs

GIS/Geospatial Expert

Los Angeles, CA · Remote

$80 - $100/hr

Document advanced technical workflows and problem-solving approaches involving AI coding agents such as Codex, Claude Code, Claude Cowork, and Claude Science . * Describe real-world tasks where AI ...

Mondo

Senior Data & AI Engineer x2

Santa Monica, CA · On-site

$200K - $225K/yr

Experience with Claude, Claude Code, Codex, Cursor, or similar AI coding tools. * Must be authorized to work in the United States without sponsorship. Preferred Qualifications: * Azure Databricks ...

Deloitte

AI Engineer Consultant

Costa Mesa, CA · Hybrid

Build and operationalize LLM-enabled capabilities (e.g., copilots, HR knowledge assistants, summarization, policy Q&A) using Claude/GPT(Codex)/Gemini, including secure endpoints, tool/function ...

Deloitte

AI Engineer Consultant

Los Angeles, CA · Hybrid

Build and operationalize LLM-enabled capabilities (e.g., copilots, HR knowledge assistants, summarization, policy Q&A) using Claude/GPT(Codex)/Gemini, including secure endpoints, tool/function ...

Oscar Health

Senior Product Designer

Los Angeles, CA · Hybrid

$149K - $195K/yr

You will use approved tools such as Claude and Codex to clarify problems, explore workflows, identify risks and edge cases, and create realistic prototypes earlier in the design process. You will ...

Oscar Health

Senior Product Designer

Los Angeles, CA · Hybrid

$149K - $195K/yr

You will use approved tools such as Claude and Codex to clarify problems, explore workflows, identify risks and edge cases, and create realistic prototypes earlier in the design process. You will ...

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Infographic showing various Codex job openings in Los Angeles, CA as of August 2026, with employment types broken down into 87% Full Time, 4% Part Time, and 9% Contract. Highlights an 76% Physical, 6% Hybrid, and 18% Remote job distribution.

Performance & Systems Engineer, Codex

OpenAI

Los Angeles, CA • On-site

$295 - $445/hr

Other

Posted 28 days ago

Job description

Performance & Systems Engineer, Codex

Research - San Francisco

About the Team

The Codex team is responsible for building state‑of‑the‑art AI systems that can write code, reason about software, and act as intelligent agents for developers and non‑developers alike. Our mission is to push the frontier of code generation and agentic reasoning, and deploy these capabilities in real‑world products such as ChatGPT and the API, as well as in next‑generation tools specifically designed for agentic coding. We operate across research, engineering, product, and infrastructure—owning the full lifecycle of experimentation, deployment, and iteration on novel coding capabilities.

About the Role

As a Performance & Systems Engineer on the Codex team, you will be responsible for whole‑system optimization across a complex, evolving stack. Codex spans LLM inference, cloud orchestration, agentic work management, and multiple product surfaces. Your job will be to identify and land high‑leverage changes—across infrastructure, modeling, and product layers—that make Codex agents significantly faster and cheaper to serve.

We’re looking for generalists who thrive in ambiguity and love chasing performance bottlenecks to ground. This is a high‑ownership role where your work will directly improve the experience of millions of users.

This role is based in San Francisco, CA. We use a hybrid work model of 3 days in the office per week and offer relocation assistance to new employees.

In this role, you will:

  • Hunt down and address inefficiencies across the Codex system stack, from agent behavior to LLM inference to container orchestration, and beyond.
  • Build tooling to measure, profile, and optimize system performance at scale.
  • Collaborate with researchers and engineers to land high‑ROI changes that improve latency and cost.

Ideal for candidates who:

  • Have experience operating across both ML systems and cloud infrastructure.
  • Enjoy diving into messy, ambiguous problems and emerging with clear wins.
  • Think holistically about performance, balancing speed, cost, and user experience.

We are 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.

Compensation

$295K – $445K + Offers Equity

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