Principal Product Engineer managing frontend architecture for AI - augmented engineering tools at Flux. Driving performance strategy and mentoring senior engineers within the hybrid work environment.
About the role
- Senior Frontend Engineer at Proxima developing AI-driven products to help independent brands connect with customers. Focused on crafting exceptional user experiences in fast-paced startup environments.
Responsibilities
- Build, maintain, and scale frontend applications using TypeScript and React
- Design and implement user interfaces for AI agent interactions, data visualizations, and consumer-facing products
- Write clean, maintainable, and semantic HTML/CSS/SCSS with a strong eye for design and UX
- Create responsive, accessible, and performant web applications that work flawlessly across devices and browsers
- Collaborate closely with product and designers to translate mockups and prototypes into production-ready code
- Build reusable component libraries and design systems
- Optimize frontend performance, including bundle sizes, load times, and runtime efficiency
- Work with backend teams to integrate APIs and manage application state effectively
- Own frontend architecture decisions and champion best practices across the team
- Stay on the cutting edge of modern frontend development, especially around AI-powered user experiences
Requirements
- 6+ years of professional frontend development experience
- Bachelor's degree (or higher) in Computer Science, Engineering, Design, or a related field
- Proven experience working in startup environments—you've shipped products fast and worn multiple hats
- Expert-level proficiency with TypeScript and React (including hooks, context, and modern patterns), with a strong ability to design maintainable, strongly-typed APIs
- Strong command of CSS/SCSS, including Flexbox, Grid, animations, and responsive design techniques
- Experience with modern frontend tooling (Webpack, Vite, ESBuild, etc.)
- Solid understanding of web performance optimization and browser APIs
- Experience building interfaces for AI-powered applications or complex data-driven products
- Daily use of AI-assisted coding tools (e.g., GitHub Copilot, Cursor, Claude Code, etc.) is a requirement
- Comfortable owning projects independently in a high-velocity development environment
Benefits
- Competitive salary
- Unlimited PTO
- Health benefits for you and your dependents
- Annual memberships to OneMedical and Teladoc
- Summer Fridays (July 4 – Labor Day)
- Weekly in-office team lunch
- 12 weeks paid parental leave
- 401(k) program
- Pre-tax commuter, HSA, and FSA benefits
- Pet-friendly office in the heart of Soho
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