Cross-Platform Service App Development

I'm looking for an experienced app developer to create a cross-platform service application for both iOS and Android.

Key Requirements:
- User-friendly interface
- Secure payment integration
- Real-time notifications
- User profiles and service listings
- Rating and review system

Ideal Skills and Experience:
- Proven experience in developing service apps
- Strong understanding of UI/UX design principles
- Expertise in backend development
- Familiarity with payment gateways
- Ability to implement push notifications

Please share your portfolio and relevant project experience.