Android Doctor Appointment & Investigations App

I'm looking for a seasoned android developer to create a doctor appointment and investigations app. The app should be feature-rich and user-friendly, making it easy for users to book appointments and get notifications about their appointments.

Key Features:
- Appointment booking: The app should allow users to book appointments with doctors seamlessly.
- Notifications: Users should receive timely notifications about their appointments.
- Physician profiles: The app should have profiles of different physicians, detailing their specializations and availability.

Additionally, this app should have integrated payment options. So, experience with secure payment gateway integration is a must.

Ideal Skills:
- Android app development
- UI/UX design
- Secure payment gateway integration
- Experience in healthcare app development will be a plus.

Please share your portfolio of similar projects when bidding.