AP Precalculus Exam Prep Web App Developer

Full-Stack Developer — SaaS Launch for AP Exam Prep App (Supabase + Stripe + Vercel) **Overview** I have a fully functional AP Precalculus exam prep web app called SteadyPrep. It works well as a prototype — students can practice multiple choice and free-response questions, get AI-powered rubric grading, and track their progress on a dashboard. I need a developer to take this prototype live as a production SaaS product. The working prototype will serve as your functional spec. You can run it, click through every feature, and know exactly what to build. No guesswork. --- **What Needs to Be Built** 1. **Vercel deployment** — deploy the app properly with environment variables and production configuration 2. **Supabase integration** — user authentication (signup/login), per-user data storage (question bank, progress, scores), row-level security 3. **Stripe subscription integration** — $50/month subscription tier, webhook to grant credits on successful payment, student billing portal 4. **Anthropic API proxy** — move AI grading calls server-side so the API key is never exposed in the browser 5. **Credit system** — per-user monthly credit cap enforced server-side, usage tracking, clear UI indicator of remaining credits --- **Tech Stack** - Frontend: React (currently CDN-based, needs conversion to proper project structure) - Backend/Auth: Supabase - Payments: Stripe - Hosting: Vercel - AI: Anthropic API (Claude) --- **What I'm Looking For** - Demonstrated experience shipping a live product using Supabase + Stripe — please include a link - Ability to give me a specific day-by-day breakdown of your approach - Fixed price bid preferred - Estimated timeline: 3-5 days for an experienced developer