Full-Stack Developer (React / Next.js / Node) for SaaS Product Build

We're an early-stage SaaS startup building a platform that helps freelancers and small agencies manage their clients, projects, and invoices in one place. Think simple, clean, and fast — a tool that replaces the messy mix of spreadsheets, email, and manual invoicing that most small teams struggle with. We've finished our core designs and built a basic first version, and now we're looking for a reliable full-stack developer to help us turn it into a polished, production-ready product and grow it feature by feature. What you'll work on: You'll own features end to end — frontend, backend, database, and API. Right now we're focused on building out the client and project dashboard, the invoice builder with PDF export, Stripe billing for our own subscription plans, and clean onboarding and authentication. After launch, there's plenty more: reporting, team accounts, and integrations. Our stack is React and Next.js with TypeScript and Tailwind on the frontend, and Node.js with Express and PostgreSQL on the backend. We deploy on Vercel and use Stripe for payments and GitHub for version control. If you're strong in this stack, you'll feel right at home. What we're looking for: Someone with real experience shipping modern, responsive web apps and solid full-stack skills across frontend, backend, database design, and API integration. Experience with SaaS products, dashboards, or Stripe subscription billing is a big plus. Most importantly, we want someone dependable who writes clean code, communicates clearly, works independently, and thinks about the product — not just the ticket. This is a part-time role to start, fully remote, with strong potential to become a long-term, ongoing engagement as we grow. To apply, please include a short personal intro (no generic copy-paste), live links to similar SaaS or web apps you've built, your experience with our stack, and your availability and rate. If you have questions about the product, ask — we'd rather talk to someone genuinely interested