Sales-Boosting Mobile App Development

I'm looking for an experienced mobile app developer to create an app aimed at generating more sales for our business.

Key requirements include:
- User-friendly interface
- Seamless navigation
- Integration with payment gateways
- Robust backend support
- Analytics and reporting tools

Ideal skills and experience:
- Proven mobile app development experience
- Strong knowledge of UX/UI design principles
- Familiarity with payment gateway integration
- Experience with analytics tools
- Ability to work within budget constraints

Please provide a portfolio demonstrating relevant experience.