Flux

Principal Product Engineer, Frontend

Flux

full-time

Posted on:

Location Type: Hybrid

Location: San Francisco • California • United States

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Job Level

Lead

Tech Stack

ReactTypeScript

About the role

  • Define and evolve the frontend architecture of a large-scale, real-time browser-based engineering tool.
  • Establish scalable patterns for state management, data synchronization, and multi-pane editing systems.
  • Lead performance strategy for large and complex hardware projects.
  • Design and review systems that integrate AI-powered workflows deeply into the UI.
  • Drive standards for code quality, observability, and maintainability.
  • Partner with backend and infrastructure engineers on API design and cross-system boundaries.
  • Mentor senior engineers and raise the technical bar across the organization.
  • Contribute to product strategy where technical constraints and opportunities shape direction.

Requirements

  • 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.
Benefits
  • Health insurance
  • Flexible work arrangements
  • Professional development
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
ReactTypeScriptstate managementdata synchronizationmulti-pane editing systemsperformance profilingdebuggingresponsive UI developmentAPI designbrowser-based engineering tools
Soft Skills
mentoringproduct judgmentcollaborationleadershiptechnical bar raising