E-Commerce Hybrid App Development

I'm in need of a proficient Android & iOS App Developer to create a hybrid e-commerce app. The app should have seamless integration with payment gateways, a comprehensive product catalog, and user authentication features.

Key Features:
- Product Catalog: The app should present a diverse array of products in a user-friendly layout.
- User Authentication: Secure login system is necessary for user registration and authentication.
- Payment Gateway Integration: Experience in integrating multiple payment gateways is essential.

Ideal Skills:
- Proficiency in cross-platform app development.
- Experience in creating e-commerce applications.
- Expertise in integrating payment gateways.
- Strong knowledge in implementing user authentication systems.

Please share your portfolio of similar projects if available.