B2B Mobile Accessories E-commerce App Development

Need a Custom B2B E-commerce Android App (Flutter) for Mobile Accessories Wholesale Description: I am looking for an experienced Flutter developer from India to build a custom B2B/Wholesale mobile app for my mobile accessories business. Key Requirements: 1. Restricted Access / Invite-Only: No public catalog. Retailers must register with their Mobile Number (OTP) and shop details. They cannot see any products or prices until I manually "Approve" them from the Admin Panel. 2. Wholesale Features: Minimum Order Quantity (MOQ) logic for each item (e.g., box packing of 10x, 50x pieces). 3. Payment System: Integrated Payment Gateway (Razorpay/Cashfree) for online payments (UPI, Cards) along with a "Pay via Transport/Offline" option for cash clients. 4. Simple Admin Dashboard: A web panel or mobile app for me to upload products, update stock, and approve new customers. Technology Preferred: Flutter (so we can launch on iOS in the future using the same code). Payment Terms: This will be a strict Milestone-based contract via Escrow. No upfront advance outside the platform. Source code handover is mandatory. Firebase ya supabase