Comprehensive Visitor & Vendor Management System

I'm looking for a robust Management System with an emphasis on the Receptionist Panel. This system should encompass both a web application and Android & iOS apps.

Key Components:
- A feature-rich Receptionist Panel is the priority. This panel should facilitate:
- Efficient Visitor Check-in/Check-out: The system should streamline the process of checking in and out visitors.
- Vendor Management: A system to keep track of all vendors.
- Appointment Scheduling: A built-in calendar for managing appointments.

- The Visitor Check-in/Check-out process should include:
- QR Code Scanning: A system that can scan QR codes for swift check-ins.
- ID Verification: An ID verification system to ensure security and authenticity.

Ideal Skills:
- Strong expertise in web development and mobile app development (Android & iOS).
- Prior experience in developing management systems would be highly beneficial.
- Proficiency in implementing QR code scanning and ID verification systems.

I'm looking for a professional who can deliver a seamless and efficient system that meets these requirements.