Product Engineer, Front End

Job Title

Product Engineer, Front End

Role Summary

Build and evolve the core web experience for Flux's browser-based editor and AI-assisted workflows. This is a product-facing engineering role focused on complex, interactive interfaces used for real engineering work.

You will work primarily in React and TypeScript, collaborating with design and ECAD engineers to keep a real-time, multi-pane application fast, reliable, and maintainable.

Experience Level

Mid-level through Senior. The team is open to candidates across this range; level and compensation align to demonstrated experience and ownership. No specific years-of-experience requirement provided.

Responsibilities

Own and deliver user-facing features in a complex, collaborative web application.

• Implement and iterate core UI features using React and TypeScript.
• Collaborate with design to refine flows from concept to production.
• Maintain predictable, scalable UI state and data flows in a multi-pane editor.
• Improve responsiveness and perceived performance as projects grow.
• Integrate frontend with APIs and backend services; make small backend changes as needed.
• Maintain shared component libraries and design-system primitives.
• Add instrumentation for usage metrics, error logging, and UX dashboards.
• Participate in code reviews, design discussions, documentation, and mentorship.

Requirements

Core qualifications for applicants.

Must-have:

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

Nice-to-have / Preferred:

• 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 apps (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.

Education Requirements

Not specified.

About the Company

Company: Flux

Headquarters: San Francisco, CA, USA

Flux builds an AI platform that automates electronic hardware design, enabling users to go from natural-language prompts to manufacturable circuit boards. Founded in 2019, the startup focuses on agentic AI for ECAD and is VC-backed.