I repair one high-value React or Next.js product workflow that is blocking launch or losing users—onboarding, checkout, forms, dashboards, responsive behavior, or API-driven state.

The sprint begins with a written acceptance test and reproducible baseline. I then implement the focused repair, cover error and recovery states, add Playwright/axe regression tests where appropriate, and deliver reviewable code with a concise before/after handoff.

Included: • one high-value workflow or tightly related defect set • responsive and accessibility-critical states • API/state integration within the agreed scope • automated regression coverage • async written progress and handoff

Best fit: an existing product with a concrete failing flow. No mandatory calls. Backend-wide rewrites, legal compliance certification, and unlimited revisions are excluded unless separately scoped.