Full Stack Developer for SaaS MVP

We are building an AI-powered SaaS platform that helps small teams automate repetitive business workflows and manage client requests in one place. The idea is already validated with a few early users, and we now want to turn the prototype into a proper MVP that can be used by real customers. The first version should include user accounts, onboarding, a simple dashboard, workflow setup, AI-generated suggestions, activity history, notifications, and a basic subscription flow. The product will need a clean web interface and a reliable backend. Users should be able to create a workspace, add team members, set up simple workflows, and use AI to generate or improve responses based on their saved business context. We do not need a huge enterprise system for v1, but the architecture should be clean enough to support more users and more automation logic later. Our preferred stack is Next.js, React, Node.js, TypeScript, Supabase or PostgreSQL, OpenAI API, Stripe, and Vercel. We are open to suggestions if you think another setup would be faster or more scalable for the MVP. We are looking for someone who has built real SaaS products before, not just landing pages or prototypes. Experience with AI features, dashboards, API integrations, subscription billing, user roles, and production deployment is important. Bonus if you have worked with RAG, LangChain, Twilio, or notification workflows. The goal is to launch the first working version within 6–8 weeks. We value clear communication, practical technical decisions, and someone who can take ownership without needing every detail written out. When applying, please share one or two relevant SaaS or AI products you built, explain your experience with AI integrations, and give a rough estimate of how you would approach the MVP build.