Cross-Platform E-commerce App Development

I'm seeking an experienced app developer to create an e-commerce application available on both iOS and Android platforms. The app should include:

- User Authentication: Secure login and registration
- Product Catalog: Comprehensive and organized product listings

Ideal skills and experience:
- Proven track record in developing e-commerce apps
- Expertise in both iOS and Android platforms
- Strong understanding of user authentication protocols
- Experience in designing intuitive and comprehensive product catalogs

Please provide examples of similar work done. Looking forward to your bids!