Android Inventory Management App Development

I'm looking for an experienced Android developer to build an inventory management app. The app will facilitate inter-branch inventory transfers through generating and scanning QR codes.

Key requirements include:

- User Authentication: Admins only
- Flash Alerts: Items needed until user clicks checkbox

Ideal skills and experience:
- Android app development
- Experience with QR code integration
- Secure authentication implementation

Please provide samples of similar work.