E-Commerce Mobile App Development

I need a mobile application built specifically for an e-commerce business. The core of the project is a clean, fast product catalog that lets shoppers browse by category, search items quickly, and view detailed photos and descriptions. From there, the user should be able to add items to a streamlined shopping cart and update quantities or variations without friction. For now, I am concentrating on those two pillars—catalog and cart—while payment processing will be handled separately at a later stage, so no gateway work is required in this phase. Please structure the code so that a payment module can be plugged in later without major refactoring. When you send your proposal, focus on your experience building similar e-commerce apps: the frameworks you prefer, any notable performance optimizations you have implemented, and how you approach responsive UI across devices. Live links to published apps or brief case studies will help me assess fit quickly. I will provide product data, basic brand guidelines, and any required APIs once we kick off. If you can deliver a stable, intuitive shopping experience, let’s move forward.