Windows Event Guest Management System

I'm seeking a skilled developer or team to create a Windows application for managing event guests. The system should include:

Registration:
- Support both online pre-registration and on-site registration.

Check-in:
- QR code scanning for guest check-in.

Receipt Issuance:
- Printed receipts.

Agent Control:
- Manage and control agents operating scanners on-site.

Ideal skills and experience:
- Proficiency in Windows application development.
- Experience with QR code integration.
- Strong background in user interface design for seamless registration and check-in processes.
- Ability to implement receipt generation and printing functionalities.
- Familiarity with managing multi-user systems and real-time data updates.

Please provide examples of similar projects and your approach to ensure a smooth and efficient system.