Cross-Platform Jewellery Shopping App Development

I need a clean, simple, and eye-catching jewellery shopping application for both iOS and Android platforms. The app should mirror the functionality of Amazon, incorporating:

- A comprehensive product catalog with search and filter options
- A shopping cart and checkout system
- User reviews and ratings
- User account creation and management

Ideal Skills and Experience:
- Proven experience in developing mobile applications for both iOS and Android
- Strong UI/UX design skills to create visually appealing and user-friendly interfaces
- Expertise in implementing secure and efficient shopping cart and checkout systems
- Familiarity with integrating user review and rating systems
- Experience in building user account management features

Please provide a portfolio showcasing similar projects.