Senior Product Engineer, Front End

53 Stations; San Francisco (CA); On-site; USD 140,000 - 210,000; Full time

Job summary

Flux is building the world's first AI hardware engineer. We are hiring a Product Engineer, Frontend to shape the core web experience of Flux. You will work across our browser-based editor, collaboration systems, and AI-powered workflows.

This is a high-ownership product engineering role focused on building and evolving complex, interactive interfaces used for real engineering work. You’ll spend most of your time in React and TypeScript, partnering closely with design and ECAD engineers to keep a

Qualifications

• Strong command of modern React and TypeScript in sizable production codebases.
• Experience shipping and iterating on complex, interactive web applications (e.g., design tools, visual editors, multi-pane interfaces).
• Experience building responsive UIs on top of asynchronous or computation-heavy backend systems.
• Strong product judgment and experience collaborating closely with design and product.
• Experience with browser performance profiling and debugging.

Responsibilities

• Build and evolve core user-facing features in the Flux web app using React and TypeScript.
• Partner with design to refine flows and interactions from early concepts through production.
• Maintain predictable and scalable UI state and data flows within a collaborative, multi-pane editor environment.
• Improve responsiveness and perceived performance as projects increase in size and complexity.
• Integrate frontend systems with APIs and backend services; collaborate on backend changes when needed.
• Maintain and evolve shared component libraries and design system primitives.
• Add and maintain instrumentation for owned features (usage metrics, error logging, UX dashboards).
• Participate in code reviews, design discussions, and lightweight documentation.
• Mentor other engineers on frontend best practices where appropriate.

Skills

React

TypeScript

Frontend

UI design

Performance

Startup environment

Location flexibility

Job description

Why Flux

Flux is taking the hard out of hardware. To do this, we’re building the world's first AI hardware engineer. Founded in 2019, our platform enables anyone to go from idea to manufacturable board using nothing more than a natural language prompt. This democratizes a process that has historically required years of specialized expertise.

We're going after a $15B+ electronic design automation market, backed by 8VC, Bain Capital Ventures, Liquid 2 Ventures, Outsiders Fund, Figma board member John Lilly, and GitHub founder Tom Preston-Werner. In February 2026, we closed a total of $37M in funding to accelerate that mission.

What happens when we unlock the ability for anyone to make hardware? We fundamentally reshape the world. That's our mission, and we're just getting started.

The Role

We’re hiring a Product Engineer, Frontend to shape the core web experience of Flux.

You will work across our browser-based editor, collaboration systems, and AI-powered workflows. This is a high-ownership product engineering role focused on building and evolving complex, interactive interfaces used for real engineering work.

You’ll spend most of your time in React and TypeScript, partnering closely with design and ECAD engineers to keep a sophisticated, real-time application fast, intuitive, and maintainable.

We are open to mid-level through senior candidates. Level, scope, and compensation will align to demonstrated experience, ownership, and the complexity of problems you can independently drive.

The Role

(Note: This section title was kept from the original as a placeholder for structure; the content below describes what you’ll do.)

What You’ll Do

• Build and evolve core user-facing features in the Flux web app using React and TypeScript.
• Partner with design to refine flows and interactions from early concepts through production.
• Maintain predictable and scalable UI state and data flows within a collaborative, multi-pane editor environment.
• Improve responsiveness and perceived performance as projects increase in size and complexity.
• Integrate frontend systems with APIs and backend services; collaborate on backend changes when needed.
• Maintain and evolve shared component libraries and design system primitives.
• Add and maintain instrumentation for owned features (usage metrics, error logging, UX dashboards).
• Participate in code reviews, design discussions, and lightweight documentation.
• Mentor other engineers on frontend best practices where appropriate.

The Role

(Note: Role header repeated for structural balance in the original; content above covers responsibilities.)

What You’ll Bring

• Strong command of modern React and TypeScript in sizable production codebases.
• Experience shipping and iterating on complex, interactive web applications (e.g., design tools, visual editors, multi-pane interfaces).
• Experience building responsive UIs on top of asynchronous or computation-heavy backend systems.
• Strong product judgment and experience collaborating closely with design and product.
• Experience with browser performance profiling and debugging.
• Comfortable working across the stack to integrate APIs and make small backend changes.
• Experience in startup or high-ownership environments.
• Based in the San Francisco Bay Area or willing to relocate.

Preferred Qualifications

• Experience building distributed, collaborative, real-time applications.
• Experience with complex editor interfaces, CAD, developer tools, or design tools.
• Familiarity with state management patterns in large React applications (Redux or equivalent).
• Experience with WebWorkers, WebAssembly, or background computation in the browser.
• Experience integrating AI-powered features into user-facing products.
• Experience building high-performance frontends handling large data models.
• Open source contributions in frontend or developer tooling.

Profile

• Impact-oriented – You care about real user value, not just shipped code.
• Comfortable with ambiguity – You thrive in evolving problem spaces.
• Collaborative – You share ideas early and welcome debate.
• Experiment-driven – You question conventions and embrace AI-native workflows.
• Ownership mentality – You bias toward action and take responsibility for outcomes.

Flux is an equal opportunity employer. We are committed to providing equal employment opportunities to all qualified individuals and do not discriminate on the basis of race, color, religion, sex (including pregnancy, gender identity, and sexual orientation), national origin, age, disability, genetic information, veteran status, or any other characteristic protected by applicable federal, state, or local law. All employment decisions are based on qualifications, merit, and business need.

Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.