Full-Stack Dev to Build AI SaaS MVP (Etsy/eBay Listing Automation Tool), Next.js/Node

I'm a solo founder building an AI-powered SaaS product. I need a full-stack developer to build the MVP end-to-end. WHAT WE'RE BUILDING A tool that automates product listing creation and management across Etsy and eBay for dropshipping sellers. Core flow: 1. User connects their Etsy/eBay seller account (OAuth) 2. User provides a source product (URL, image, or basic details) 3. Tool generates optimized listing content (title, description, tags) via LLM, pulls/processes product images 4. User reviews/edits, then tool publishes or updates the listing via the marketplace API 5. Basic sync: track listing status, handle re-publish on edits TECH STACK (open to your recommendation, but this is our default) - Frontend: Next.js + Tailwind - Backend: Node.js or Python (FastAPI) - DB: Postgres (Supabase is fine) - Auth: Clerk/Supabase Auth (for our users) + OAuth (for Etsy/eBay seller accounts) - AI: Anthropic or OpenAI API - Hosting: Vercel + Railway/Render SCOPE OF THIS ENGAGEMENT - User auth + billing (Stripe, subscription-based) - Etsy API and eBay API integration (OAuth, listing CRUD, rate-limit handling) - LLM pipeline for listing content generation - Basic dashboard: connect accounts, create/manage listings, view sync status - Deployed, working product, not just local dev NOT IN SCOPE (for now) - Additional marketplaces beyond Etsy/eBay - Inventory/order management beyond listing sync - Mobile app WHAT I NEED FROM YOU - Architecture recommendation before we start (brief written plan) - Weekly async updates (Loom or written), I don't need daily calls - Clean, documented code I can hand to another dev later if needed - Deployed staging environment I can test throughout, not just at the end BUDGET & TIMELINE Fixed price: $3,500 for MVP, paid in milestones. Target timeline: 4–6 weeks for a working MVP. Strong potential for ongoing/future work if this goes well. TO APPLY Please answer the screening questions below in your proposal. Generic/copy-paste proposals will not be considered.