Android Doctor Appointment App Development

I need an experienced mobile app developer to create an Android app for doctor appointments. The app must include:

- Appointment Booking: Users can schedule, reschedule, or cancel appointments.
- Patient Medical Records: Secure access to personal medical history.
- Doctor Profiles: Detailed information on healthcare providers.

Ideal skills and experience:
- Proficient in Android app development
- Experience with secure medical data handling
- UI/UX design for user-friendly interfaces

Please provide relevant portfolio and past project experience.