Apartment Maintenance App and Website Development

I'm seeking a talented developer to create a comprehensive website and mobile app for my apartment maintenance startup. The app should be available on both iOS and Android platforms.

The website must include:
- Booking maintenance services
- User reviews and ratings
- Payment gateway integration

Ideal skills and experience:
- Proficiency in mobile app development for both iOS and Android
- Strong web development skills
- Experience with payment gateway integration
- Ability to create user-friendly interfaces
- Previous work in service-based apps or websites is a plus

Please include detailed project proposals in your applications.