React Native Buy & Sell App

I need a React Native app for my buy and sell website, replicating its functionalities. The app should be available on both iOS and Android platforms.

Essential Features:
- User registration and login
- Product listing and browsing
- Payment processing

Ideal Skills and Experience:
- Proficiency in React Native
- Experience in developing cross-platform mobile apps
- Familiarity with payment processing integrations
- UI/UX design skills for a seamless user experience

Please ensure the app mirrors all website functionalities.