Create an E-Commerce App with Unique Features

I'm looking for a professional mobile app developer who can create a robust e-commerce application similar to Fashion Nova. The app is intended to be developed for both iOS and Android platforms, with an additional web app component. Key Features: - User Registration and Login - Product Browsing and Search - Shopping Cart and Checkout - Vendor Page - Order Tracking - Admin Panel - Dynamic Backend Analytics - Personalization - In-App Chat for Customer Service I am not looking for specific design or branding requirements at this stage. I'm particularly interested in your experience with e-commerce app development, as well as any unique features or functionalities you can suggest to enhance the user experience. Please provide any relevant examples from your portfolio.