Senior Frontend Engineer (React/Next.js)
Engineering • Remote (EU/US Timezones)
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Full-time Engineering Remote (EU/US Timezones)$120k - $160k + Equity
About the Role
We are looking for a product-minded Frontend Engineer who treats the browser as a rendering engine, not just a document viewer. You will own the architecture of our dashboard, ensuring 60fps animations, sub-100ms interaction latencies, and a 'Tactical HUD' aesthetic that makes users feel like they are piloting a spaceship.
Responsibilities
- Architect and build scalable UI components using Next.js 15, React Server Components (RSC), and Tailwind CSS v4.
- Implement complex data visualizations (D3.js or Recharts) to render large datasets of biological metrics without layout trashing.
- Optimize Web Vitals (LCP, CLS, INP) to the absolute limit. We aim for 100/100 Lighthouse scores.
- Collaborate with design to implement 'framer-motion' micro-interactions that deligth but don't distract.
- Maintain the local-first sync engine (SQLite/WASM) ensuring offline capability.
Requirements
- 5+ years of experience with modern React (Hooks, Context, Composition patterns).
- Deep understanding of the DOM, browser rendering pipeline, and JS performance profiling.
- Experience with TypeScript generics and utility types (we are strict mode only).
- Ability to implement pixel-perfect designs from Figma.
- Experience with state management libraries (Zustand, Joptai, or XState).
Bonus Points
- +Experience with WebGL / Three.js.
- +Contribution to open-source UI libraries.
- +Interest in Quantified Self or data-driven health.
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Send your resume and a link to your GitHub/Portfolio to our recruiting team.
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