Doctor Appointment System Web Development

I need a freelance web developer to create a custom-built Doctor Appointment System. This should have an easy-to-use interface for both patients and admin (doctor/reception) panels.

Key Features Include:
- Patient Module: Simplified appointment booking, QR code access, WhatsApp confirmations, and unique Patient ID generation.
- Admin Panel: Real-time appointment notifications, patient database management, date availability settings, and WhatsApp notifications.

The ideal candidate will have:
- Extensive experience in web application development
- Proven track record of designing user-friendly interfaces
- Expertise in secure database management
- Familiarity with integration of APIs, particularly WhatsApp's

Please provide your quotation, project timeline, and links to relevant portions of your portfolio.