Cross-Platform Product Selection Appreciate -- 2

I'm looking for a skilled mobile app developer who can also provide design services. The app should allow customers to select physical products and specify quantities. Once their selection is complete, they should be able to send the order to a WhatsApp number.

Requirements:
- Develop the app for both iOS and Android platforms
- Users should be able to select physical products and input quantities
- Integrate a feature to send orders to a specified WhatsApp number
- Provide design services to create an intuitive and user-friendly interface

Ideal Skills and Experience:
- Proficiency in mobile app development for both iOS and Android
- Experience in UI/UX design
- Familiarity with WhatsApp integration
- Strong portfolio demonstrating similar projects

Please share your portfolio and approach to this project.