Premium Home Maintenance App

I'm seeking a skilled developer to create a mobile app for a premium home maintenance concierge service. The app should be developed for both iOS and Android platforms. The web-app is ready and being used currently, and this needs to be now converted to a mobile ready app.

Core functionalities:

- Booking appointments: Users can schedule maintenance tasks.
- Payment processing: Secure transactions within the app.
- Customer messaging: Direct communication between users and service providers.
- User login and profile management: Personalized user accounts.

Ideal skills and experience:
- Experience in mobile app development for both iOS and Android
- Expertise in integrating secure payment processing systems
- Strong background in developing messaging systems within apps
- Proficiency in user authentication and profile management features

Please provide your portfolio and relevant experience. Looking forward to your bids!