Blonde Waterfall is a SaaS platform for real estate agents. Agent imports a property listing, our AI plans a full month of social media video content, we render the videos automatically and the agent approves and schedules posting. Credit-based pricing model. Current state of the app: React 19 + TypeScript SPA that's been vibe-coded with mock data. ShadCN/UI, Tailwind 4, React Router 7 are already in place. No backend integration yet — everything runs on local storage. The frontend dev's job is to take this prototype and turn it into a production app wired to real APIs. They own: Auth system (Firebase Auth, Google OAuth, protected routes) Stripe billing (subscriptions, credit ledger, webhooks, customer portal) Onboarding flow (multi-step wizard + cinematic reveal sequence) Review/approval system for rendered videos Notification system (real-time via Firestore) Email service (SendGrid, ~14 transactional templates) Referral system Cancellation + data retention flow Internal editor dashboard (can be vibe-coded) Audio swap service (FFmpeg) Every user-facing page: dashboard, listings, marketplace, calendar integration, review page, settings, billing Tech stack they need to know: React 19, TypeScript, React Router 7, React Query (TanStack), Zustand, Tailwind CSS 4, ShadCN/UI, Firebase Auth + Firestore, Node.js (Express or Fastify), Stripe, SendGrid, Zod, React Hook Form, FullCalendar React, Recharts. Timeline: 8 weeks.