Diagnostic Centre App Development

I'm looking for an experienced app developer to create a diagnostic centre application for patients. The app should be available on both iOS and Android platforms.

Key Features:
- Appointment booking: Patients should be able to easily schedule appointments.
- Test result viewing: Patients need a secure way to view their test results.
- Payment processing: Integrated payment system for convenience.

Ideal Skills and Experience:
- Proven experience in mobile app development, specifically for iOS and Android.
- Strong background in integrating secure payment gateways.
- Experience in building user-friendly interfaces for patient-centric applications.
- Knowledge of data security and privacy regulations in healthcare.