Full Stack Developer

Job title: Senior Full Stack Developer — Marketplace Web App (MVP) Project description: We're building e-yuda, a mobile-first web platform that connects customers with local tradespeople (plumbers, electricians, gardeners, and more) in Mexico. Think of it as a booking and trust layer for an industry that currently runs almost entirely on word of mouth and WhatsApp. The MVP includes location-based provider discovery, time-window scheduling, a dual-confirmation visit flow, an in-platform wallet, photo-based proof of visit, a ratings system, and an internal admin dashboard for moderation and payments. This is a greenfield build. You will be the sole developer, working directly with the founder, and will have full ownership of technical decisions within the agreed stack. Deliverables: - Customer-facing web app: search, provider profiles, booking flow, checkout (card + wallet), visit confirmation, and reviews - Provider-facing web app: availability management, incoming booking requests (accept/reject), photo upload, and job confirmation - Admin dashboard: provider approvals, booking management, payment ledger, refund processing, and dispute handling - Backend API covering all business logic: scheduling, wallet, payments, notifications, and role-based access - PostgreSQL database schema designed for long-term scalability - Integration with Mercado Pago (payments), Google Maps Platform (location/search), AWS S3 (photo storage), and Twilio (SMS OTP) Skills required: - React and Next.js for frontend development - Node.js and NestJS for backend API development - PostgreSQL — schema design and query optimization - REST API design and third-party API integrations - Experience with payment gateway integrations (Mercado Pago is a plus) - Familiarity with AWS (S3, hosting) - Ability to work independently and make sound architectural decisions without a tech lead This is a milestone-based project. We are aiming to complete and launch the MVP within a defined timeframe to be agreed upon at the start of the engagement. If you have experience building marketplace or booking platforms, please share examples of similar work, a short note about your interest, and your thoughts on the stack or approach. You're an even better fit if you have experience with geolocation features or Mercado Pago integrations.