Cross-Platform Coupon App Development

I'm looking for an experienced developer to create a mobile coupon application for both iOS and Android platforms.

Key Features:
- User-friendly interface to browse and redeem coupons
- Location-based services to find nearby deals
- Secure user authentication and profile management
- Integration with payment gateways
- Backend database to manage coupons and user data

Ideal Skills and Experience:
- Proven experience in developing mobile applications for both iOS and Android
- Strong knowledge in UI/UX design
- Experience with secure authentication processes
- Familiarity with location-based services and payment gateway integration
- Proficient in backend development and database management

Please provide examples of previous work and a brief outline of your approach to this project.