Full Stack Developer for Multivendor E Commerce Web and Mobile App

We are looking for an experienced Full-Stack Development Team (or highly skilled individual developer) to build a modern Multi-Vendor eCommerce Platform consisting of: • Responsive Web Application • Android & iOS Mobile Apps • Admin Dashboard • Vendor Portal • REST APIs The platform will allow multiple vendors to register, manage their stores, upload products, receive orders, and manage deliveries, while customers can browse products, place orders, and track shipments. Scope of Work Customer Features • User Registration & Login (Email, Mobile OTP, Social Login) • Product Search & Filtering • Categories & Subcategories • Product Reviews & Ratings • Wishlist • Shopping Cart • Secure Checkout • Multiple Payment Gateways • Order Tracking • Notifications (Email, SMS & Push) • Order History • Returns & Refund Requests Vendor Features • Vendor Registration & Approval • Vendor Dashboard • Product Management • Inventory Management • Pricing & Discount Management • Order Management • Shipping Management • Sales Reports • Earnings & Settlement • Coupon Management Admin Panel • Dashboard & Analytics • Vendor Management • Customer Management • Product Approval • Commission Management • Category Management • CMS Pages • Banner Management • Coupon Management • Order Monitoring • Reports • Role-based Access Control • System Configuration Mobile Applications • Android App • iOS App • Push Notifications • Real-time Order Tracking • Digital Wallet Support • QR Code Support (optional) Technical Requirements We are open to modern technologies such as: Backend • .NET Core • Node.js (NestJS/Express) • Laravel • Django Frontend • React • Next.js • Angular Mobile • Flutter (Preferred) • React Native Database • PostgreSQL • MySQL • SQL Server Cloud & DevOps • AWS / Azure / GCP • Docker • CI/CD • GitHub/GitLab Required Experience Please include: • Links to similar Multi-Vendor Marketplace projects • Live websites or mobile apps • GitHub (if available) • Team structure • Technology stack recommendation • Estimated timeline • Estimated budget • Maintenance and support plan Nice to Have • AI-powered product recommendations • Chat between customer and vendor • Multi-language support • Multi-currency support • Loyalty & Reward Program • Affiliate System • Subscription Plans • Warehouse Management • Delivery Partner Integration • Analytics Dashboard Deliverables • Complete Source Code • Web Application • Android App • iOS App • Admin Portal • Vendor Portal • API Documentation • Deployment on Production • Testing & Bug Fixes • 3 Months Post-launch Support Proposal Requirements Please answer the following: 1. Share links to similar marketplace projects. 2. Which technology stack do you recommend and why? 3. Estimated development timeline. 4. Estimated fixed-price cost. 5. Size of your development team. 6. Experience with payment gateway and shipping integrations. 7. Experience building scalable multi-vendor marketplaces. We are looking for a long-term development partner with proven experience in building scalable marketplace platforms. Preference will be given to candidates who can demonstrate live production applications and provide a clear development roadmap.