Full-Stack Development for On-Demand Service Marketplace (Website + iOS + Android)

We are looking for an experienced full-stack development team or agency to build a scalable, modern on-demand service marketplace similar to platforms like Urban Company, TaskRabbit, or Thumbtack. The solution should include: Customer Web Portal Customer Mobile App (iOS & Android) Service Provider Mobile App (iOS & Android) Admin Panel (Web) The platform will connect customers with verified service professionals for booking, scheduling, payments, and service management. Scope of Work Customer Features User registration & login (Email, Phone, Google, Apple) Profile management Location detection & address management Search services by category Filter & sort providers Real-time availability Instant & scheduled bookings Multiple payment methods Booking history Live order tracking In-app chat Push notifications Ratings & reviews Coupons & promo codes Wallet & refunds Support & ticket system Service Provider Features Registration & KYC verification Profile & portfolio management Service management Availability calendar Accept/Reject bookings Route navigation Earnings dashboard Wallet Payout requests Performance analytics Customer chat Ratings & reviews Notifications Admin Panel Dashboard & analytics User management Provider verification Category & service management Booking management Commission management Coupons & promotions CMS pages Payment management Reports Refund management Dispute resolution Push notification management Support management Role-based access Technical Requirements Cross-platform mobile development (Flutter or React Native preferred) Modern backend architecture (Node.js, NestJS, Laravel, or similar) REST APIs or GraphQL PostgreSQL/MySQL Cloud deployment (AWS, Azure, or GCP) Scalable architecture Secure authentication Payment gateway integration (Stripe, Razorpay, etc.) Google Maps integration Firebase Push Notifications Analytics integration CI/CD setup Clean, documented code Deliverables Complete responsive website Android application iOS application Admin Panel Backend APIs Database Deployment Source code Technical documentation 60–90 days post-launch support Required Experience Please share examples of similar marketplace or on-demand service platforms you have developed. Include:\ Website URLs Android App links iOS App links Your role in the project Team size Tech stack used Experience with platforms similar to Urban Company, TaskRabbit, Thumbtack, HomeTriangle, or other service marketplaces will be preferred. Proposal Requirements Please answer the following: Share your best marketplace/on-demand projects. Which technology stack do you recommend and why? Estimated timeline for MVP and full product. Estimated development cost. Team composition. Post-launch support process. Similar projects you've completed. Any suggestions to improve this platform. We are looking for a long-term development partner with strong communication skills, proven marketplace experience, and the ability to build a scalable product with high-quality UI/UX.