Frontend Software Engineer, Codex App
Onsite
San Francisco, California, United States
Mid (3+ yrs)
Today
Quick Take
Frontend software engineer role at OpenAI working on the Codex desktop app and IDE extension in San Francisco, Seattle, or London (Onsite). You will build desktop interfaces and human-agent interaction surfaces using React, TypeScript, and Electron. Direct application via OpenAI's careers portal.
🏢 About OpenAI
OpenAI is an AI research and deployment organization committed to building safe, highly capable artificial general intelligence that benefits all of humanity. From the GPT series to specialized tools like Codex, OpenAI invents foundational technologies and delivers them through intuitive products to millions of creators and developers.
🎯 The Role
As a Frontend Software Engineer on the Codex App team, you will build and evolve the Codex desktop client and companion IDE extensions. This is a craft-focused engineering role centered on inventing the interactive surfaces that connect software engineers with autonomous agents—defining how progress, uncertainty, status handoffs, and timeline reviews look and feel in daily coding workflows.
🛠️ Tech Stack
- React
- TypeScript & JavaScript
- Electron framework
- VS Code Extension API & IDE integration
- Design systems, CSS3, and animation primitives
💼 What You'll Do
- Build, polish, and optimize desktop UI across the Codex desktop client and code editor extensions
- Partner closely with product designers to transform experimental prototypes into robust, responsive products
- Design intuitive interaction paradigms for delegating tasks, reviewing code changes, and monitoring agent progress
- Establish frontend architectural patterns across client state management, UI component trees, and navigation
- Implement rigorous automated testing, observability, and thoughtful UI states for edge and failure conditions
- Collaborate with backend, runtime, and model researchers to expose new capabilities to end users cleanly
✅ What You'll Need
- Strong background in building complex web or desktop applications with React and TypeScript
- Obsessive attention to design engineering, layout balance, interaction physics, and visual fidelity
- Practical experience building desktop-grade software using Electron or comparable desktop UI containers
- Experience designing scalable frontend systems, state architectures, and performance-optimized render loops
- Strong comfort exploring ambiguous problem spaces through quick iterative cycles
- Willingness to work onsite from OpenAI offices in San Francisco, Seattle, or London
🌟 Nice to Have
- Hands-on experience developing IDE plugins, code editor extensions, or developer tools
- Familiarity with telemetry, error-budget tracking, and desktop client distribution pipelines
- Exposure to human-in-the-loop AI interaction models and prompt-driven UI state engines
Why This Role?
This is a curated frontend role from OpenAI. Every listing on OnlyFrontendJobs is hand-picked for frontend relevance and quality. The tech stack leans on React, TypeScript, JavaScript and more. Tagged 💰 High Comp for above-market pay.
Frontend Software Engineer, Codex App at OpenAI — FAQ
Quick answers about this role, the stack, and how to apply.