Mobile App Development -2

I'm looking for a skilled mobile app developer to create an e-commerce app. The primary purpose of the app is to facilitate online shopping.

Key Requirements:
- Payment gateway integration is essential
- Square must be integrated as the payment gateway

Ideal Skills and Experience:
- Proven experience in developing e-commerce mobile apps
- Expertise in payment gateway integration, specifically with Square
- Strong knowledge of mobile app development frameworks and technologies
- UI/UX design skills to ensure a user-friendly shopping experience
- Ability to conduct thorough testing for a bug-free launch

Please provide examples of previous e-commerce apps developed and your approach to this project.