Complete Online Booking and Management Software Development

I need a professional developer to build a complete online booking and appointment management software called BookEase.

The platform should be suitable for salons, clinics, consultants, restaurants and other service-based businesses.

Key requirements:
• Modern responsive website and user-friendly UI/UX
• Customer registration and login
• Business/admin dashboard
• Service and pricing management
• Staff management and availability
• Calendar and real-time appointment scheduling
• Automatic time-slot management and double-booking prevention
• Booking, cancellation and rescheduling
• Online payment integration
• Email, SMS and WhatsApp booking notifications
• Customer booking history
• Revenue and booking analytics
• Secure REST APIs
• PostgreSQL database
• Mobile-responsive design
• Clean, scalable and well-documented code

Preferred technology:
Frontend: React / Next.js
Backend: Python FastAPI
Database: PostgreSQL
Authentication: JWT/OAuth
Payments: Razorpay/Stripe
Notifications: WhatsApp, SMS and Email
Deployment: Vercel