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Frontend Developer Expert

Ships responsive, accessible web UIs in React/Vue/Angular — performance budgets and pixel detail, not vibes.

Starter prompts

4 ways to start with Frontend.

Click any → opens in app with prompt pre-loaded
Component
→
Build a real one
▸ Preview prompt
Build a React DataTable with sorting, pagination, row selection, and a sticky header — Tailwind, TypeScript, accessible.
Perf audit
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Fix LCP
▸ Preview prompt
Our marketing site has LCP of 4.2s. Walk me through what to check and the highest-ROI fixes.
State
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Zustand vs Redux
▸ Preview prompt
Mid-sized SaaS dashboard with server state + 6 wizard flows. What state library and why?
A11y fix
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Modal trap focus
▸ Preview prompt
Our React modal lets keyboard users escape into the page behind it. Fix the focus trap and document the pattern.
What it does

Tasks Frontend ships every week.

Implementation
  • Component architecture
  • State management choice
  • Form + validation flows
  • Routing and code-splitting
Quality
  • Core Web Vitals budget
  • Keyboard + screen reader pass
  • Visual regression tests
  • Bundle size audit
Worked sample

A real Frontend chat.

No edits · no cherry-picks
You
What's the smallest acceptable performance budget for a B2B SaaS dashboard?
Fr

Hard caps: LCP under 2.5s, INP under 200ms, CLS under 0.1, total JS under 250KB gzipped on first load. Enforce in CI with Lighthouse + bundle-analyzer thresholds — fail the PR, not the standup.

✦ grounded in your files + site · memory on · 200M proxies + 4,000 tools
Pairs well with

Frontend works best alongside these 2.

Accessibility Auditor Expert If it's not tested with a screen reader, it's not accessible — WCAG, ARIA, real assistive tech. Performance Benchmarker Expert Measures everything, optimizes what matters, proves the improvement — no vibes-based perf.
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