Frontend Software Engineer, Codex App · OpenAI

Fri, 06 Mar 2026 18:26:14 GMT
Engineering

OpenAI · San Francisco, London, UK, Seattle · $230K – $385K • Offers Equity · hybrid

Job Posting

Frontend Software Engineer, Codex App

Location

San Francisco; London, UK; Seattle

Employment Type

Full time

Department

Applied AI

Compensation

$230K – $385K • Offers Equity

The base pay offered may vary depending on multiple individualized factors, including market location, job-related knowledge, skills, and experience. If the role is non-exempt, overtime pay will be provided consistent with applicable laws. In addition to the salary range listed above, total compensation also includes generous equity, performance-related bonus(es) for eligible employees, and the following benefits.

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.

More details about our benefits are available to candidates during the hiring process.

This role is at-will and OpenAI reserves the right to modify base pay and other compensation components at any time based on individual performance, team or company results, or market conditions.

About the Team

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.

About the Role

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.

You Might Thrive Here If You

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).

About OpenAI

OpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artificial intelligence benefits all of humanity. We push the boundaries of the capabilities of AI systems and seek to safely deploy them to the world through our products. AI is an extremely powerful tool that must be created with safety and human needs at its core, and to achieve our mission, we must encompass and value the many different perspectives, voices, and experiences that form the full spectrum of humanity.