White (ethical) hack my QR-code scanner application for "fake" true response

Hello,

I am looking for a well experienced white (ethical) hacker who can find a weakness in the application, which scans a QR-code. I am looking if it has a weakness in which a fake true response can be sent and the QR-code scanner gets a true response.

Professionals only, please. No intermediates, no juniors.

Thanks a lot,
Umut