Full-Stack Developer for Custom Marketplace

We're an early-stage startup building a three-sided marketplace in the home-improvement space that connects consumers, retailers, and service providers in a single transaction. Users configure and price an order, choose a service provider, and pay once; funds are held and then split between the parties when the work is approved. We have a complete working prototype and detailed technical specs ready to share under NDA. We're not looking for someone to design the product — we need a strong engineer to build a well-defined system into a production application. What we need built Backend + database: PostgreSQL, a clean API, multi-role authentication and access control, and server-side business/pricing logic. Consumer web app: a multi-step configuration and checkout flow. Two role-based dashboards (web + mobile-first) for the supply side, including scheduling, status tracking, and photo uploads. Marketplace payments (critical): Stripe Connect — hold customer funds, then split into a platform fee and multiple party payouts on approval. Integrations: SMS, transactional email, mapping/geolocation, and file storage. Tech stack Next.js (React) + TypeScript · PostgreSQL · Supabase or AWS · Stripe Connect · React Native / Expo for mobile · Vercel or AWS Amplify · GitHub. Must-have qualifications Shipped at least one real two- or three-sided marketplace (please link it) Stripe Connect — multi-party payments, held funds, split payouts (not just basic Stripe checkout) Strong PostgreSQL + API + multi-role auth / access control Next.js / React / TypeScript Comfortable building from an existing prototype and written spec Clear, proactive communication Nice to have React Native / Expo · Supabase and/or AWS Amplify · Twilio, mapping, and email integrations How we'll work We'll share full details, the prototype, and specs after a signed mutual NDA. Phased delivery, one milestone at a time, starting with a small paid trial task before the full engagement. All work is "work made for hire" with full IP assignment to us (included in the contract). To apply, please include A link to a live marketplace you built (ideally with Stripe Connect). Your answer to this question: "How would you hold a customer's payment and split it between two other parties only after the customer approves the completed work?" A rough MVP timeline and cost estimate, and your availability. Confirmation you're comfortable signing an NDA and an IP-assignment agreement.