> Markdown version of [/jobs/ext/3555758-frontend-software-engineer-codex-app](https://www.wearedevelopers.com/jobs/ext/3555758-frontend-software-engineer-codex-app). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Frontend Software Engineer, Codex App - **Company:** OpenAI Inc. - **Location:** Seattle, WA, United States - **Salary:** $230,000.0 - **Contract:** Permanent contract - **Skills:** Software Applications, Programming Tools, TypeScript, ReactJS, Backend, Front End Software Development - **Published:** October 2, 2026 - **Apply:** https://jobs.localjobnetwork.com/apply/add/86498808/1 ## About the Role * Have strong experience with modern frontend stacks (React, TypeScript) and a high bar for UI craft. * Love design engineering: sweating the details while keeping velocity. * Have built desktop-caliber product experiences (Electron or similar), and care about performance, responsiveness, and "it just feels right." * Enjoy exploring ambiguous problems and iterating rapidly with design and product. * Think in end-to-end workflows, not isolated screens. * Have experience with developer tools or IDE extensions (nice-to-have). ## Description We're hiring a Frontend Software Engineer to build a top-tier desktop experience and push forward the interface for working with agents. This is a craft-heavy role: you'll partner closely with design to prototype, iterate, and polish new interaction models - then turn them into reliable, high-performance product. You'll help define what great looks like for "human agent" collaboration: what belongs in the UI, how state is represented, how progress and uncertainty are communicated, and how users stay oriented across long-running and multi-step work. What You'll Do * Build and ship polished, high-performance UI across the Codex desktop app and IDE extension. * Partner tightly with design to turn prototypes into production-quality experiences (layout, motion, typography, interaction details). * Iterate on future interfaces for interacting with agents: delegation, task timelines, status/progress, handoffs, review, and control surfaces. * Own frontend architecture decisions (component systems, state management, navigation, rendering performance). * Improve quality and reliability through testing, instrumentation, and thoughtful UX for failure modes. * Collaborate with platform/model/backend partners to integrate new capabilities into cohesive product flows.