QR Code Event Registration App

I'm looking for a developer to create a versatile event registration app/platform accessible via QR code. This platform should be usable for various events, allowing me to reprogram it as necessary.

Key Features Required:
- Access via QR code
- Registration details: Name, email, phone number, company, job title
- Event information: Agenda, speakers' bios, venue details
- Post-registration email with reference number and QR code
- On-site badge printing using reference number or QR code

Ideal Skills and Experience:
- Mobile and web app development
- Database management
- Email automation
- QR code integration
- User-friendly interface design