Senior Product Engineer, Front End

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.

Required 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.
• 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.