Cross-Platform E-Commerce App Development

I’m launching a new online store and need a polished mobile app that runs smoothly on both iOS and Android. The core of the project is classic e-commerce functionality: secure user authentication, a reliable payment gateway, and fast product search with filter options.

Your task is to design and build the complete app, connect it to whichever backend you recommend, and get it approved in both App Store and Google Play. I’m open to React Native, Flutter, or fully native builds—as long as the final experience feels lightning-fast and modern. Solid UI/UX, clean code, and clear documentation are essential.

Deliverables
• Full iOS and Android builds, ready for store submission
• Source code and build instructions
• Integrated user sign-up/login (email, social, or both)
• Payment gateway wired for live transactions
• Product catalogue with search and filter
• Basic admin or API endpoints so I can manage products, pricing, and orders

Please share a brief outline of your proposed tech stack, estimated timeline, and two or three live e-commerce apps you’ve shipped. I’m keen to move quickly once we agree on scope.