Full-Stack Developer — React/Vite Migration, Stripe Payments & PWA

I need an experienced full-stack developer to help migrate my existing equestrian web app (React + Vite frontend, Express API backend, Supabase database) from Replit to production hosting on Vercel and Render. I also need Stripe subscription payments implemented, Cloudflare R2 video storage, a security audit, and PWA conversion. The app is fully built and working with real users — this is infrastructure and payments work only.