Full-Stack SaaS Developer (MVP / Startup Builder

We are building a simple SaaS product for contractors and small service businesses to create invoices, send them to clients, and collect payments online. We are looking for a full-stack developer to build the MVP from scratch. The product is similar in scope to SimpleInvoices but with Stripe payments and a clean modern UI. Core requirements: React / Next.js frontend (or similar modern stack) Backend (Node.js, Supabase, or Firebase) Stripe integration for payments Authentication system (email login) Database for customers, invoices, and payments Basic dashboard UI MVP features: Create and send invoices Manage customers Track payments Email invoice to clients Stripe payment link integration Nice to have: Experience building SaaS products Previous Stripe integration experience Understanding of subscription products This is an MVP build with potential for long-term ongoing work if successful