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The Codex App team builds and maintains the Codex desktop app and IDE extension — the primary ways developers interact with Codex. Our goal is to make AI feel like a real software engineering teammate inside real workflows: editing code, running tasks, reviewing changes, and coordinating long-running work. We sit at the intersection of research, product, and design. We ship quickly, learn from real usage, and continuously refine both the experience and the harness that connects users to the model. 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.
Job Responsibility:
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
Requirements:
Strong experience with modern frontend stacks (React, TypeScript) and a high bar for UI craft
Love design engineering: sweating the details while keeping velocity
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
Nice to have:
Experience with developer tools or IDE extensions
What we offer:
Medical, dental, and vision insurance for you and your family, with employer contributions to Health Savings Accounts
Pre-tax accounts for Health FSA, Dependent Care FSA, and commuter expenses (parking and transit)
401(k) retirement plan with employer match
Paid parental leave (up to 24 weeks for birth parents and 20 weeks for non-birthing parents), plus paid medical and caregiver leave (up to 8 weeks)
Paid time off: flexible PTO for exempt employees and up to 15 days annually for non-exempt employees
13+ paid company holidays, and multiple paid coordinated company office closures throughout the year for focus and recharge, plus paid sick or safe time (1 hour per 30 hours worked, or more, as required by applicable state or local law)
Mental health and wellness support
Employer-paid basic life and disability coverage
Annual learning and development stipend to fuel your professional growth
Daily meals in our offices, and meal delivery credits as eligible
Relocation support for eligible employees
Additional taxable fringe benefits, such as charitable donation matching and wellness stipends, may also be provided
Offers Equity
Performance-related bonus(es) for eligible employees