Full-Stack Dev for Fintech SaaS MVP (Supabase + Stripe + Node, AI features)

We're a small fintech startup building the MVP of a subscription SaaS product and looking for a senior full-stack developer to take it from plan to production. The product lets users connect their accounts, see a clean analytics dashboard, and get AI-generated insights on their financial activity. We have wireframes and a clear feature list; we're looking for someone who can shape the technical approach, not just execute tickets. What we need built: User authentication and per-user data isolation (Supabase, Postgres, row-level security) Stripe subscription billing with webhook-driven access (monthly tier, billing portal) A React dashboard (clean, responsive) wired to a Node backend An AI insights layer using the Anthropic API, called server-side so keys are never exposed Deployment on Vercel with proper environment/config management You're a strong fit if you: Have shipped real production SaaS on Supabase + Stripe (please share a live link) Are fluent in TypeScript, React, and Node Have worked with the Anthropic API or similar LLM integrations Communicate clearly and flag scope or security concerns early To apply, please include: One live SaaS product you built with Supabase and Stripe (link + your specific role) How you handle keeping API keys and payment logic secure server-side Your hourly rate and availability A rough day-by-day or milestone approach to an MVP like this Start: soon. Ongoing potential if it's a good fit.