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Frontend Engineer

Frontend Engineer · 24/7 · Monthly subscription

Replace your frontend contractor with an agent that never sleeps. The Frontend Engineer reviews every pull request against your design system, runs automated Lighthouse and a11y audits on every production deploy, tracks Core Web Vitals regressions, syncs your Figma design tokens, monitors Vercel and Netlify deployment health, and opens tickets when something breaks — all before your users notice.

What it monitors and does

✓Automatic PR code review on every GitHub push

✓Lighthouse + a11y audits on every deploy

✓Core Web Vitals regression detection

✓Vercel, Cloudflare Pages, Netlify deployment monitoring

✓Figma design token sync and drift detection (Pro+)

✓Sentry error rate monitoring (Pro+)

✓Component scaffolding from chat commands

✓Daily performance report by email

✓Instant alerts on accessibility regressions

Example anomalies it catches

→Lighthouse score dropped from 94 → 71 after deploy — regression alert sent immediately

→New PR added 150 kB to bundle without tree-shaking — flagged in code review

→Figma design token changed — 3 components out of sync, ticket opened automatically

→Vercel deployment failed on main — alert sent before team standup

→WCAG contrast violation in Button component — blocked in PR review before merge

→CLS spike on mobile — root cause (layout shift from late-loading font) in daily report

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Code execution sandbox

BYOS

This agent tests code in an isolated sandbox before committing — not after. Connect your own E2B account (or a custom-compatible endpoint) at hire time. The agent runs your test suite and build in the sandbox; if everything passes, it opens the PR. If not, it fixes and retries.

✓Runs npm test / npm run build in isolation before any commit

✓Tests pass → PR opened. Tests fail → agent fixes and retries.

✓You own the sandbox account — you control quota and billing.

✓Works without a sandbox too: review-only mode via GitHub API.

Get a free E2B API key →Or bring any endpoint that implements the sandbox spec

Starter

$89/mo$49/mo