QR Code Based Restaurant Ordering Web App

I'm seeking a freelancer to develop a web app with QR code functionality for a restaurant. The app should allow customers to scan a QR code to display the menu and place their orders directly from their devices.

Key features required:
- QR codes that both display the menu and allow for order placement
- User authentication features that support both login and guest access

Ideal skills and experience:
- Proficient in web app development
- Experience with QR code technology
- Knowledge in implementing user authentication systems
- Prior experience in developing restaurant software would be a plus