Hi. I'm a middle android developer. Worked for 2 years in Samsung Ukraine, developed and tested standard apps for android platform on Samsung devices, like Contacts, Messenger, Clocks and others. Have few pet-projects, one of them I finally plan to load on Google Play in few weeks. If you want, I can send you screenshots of my simple friends app.
Have experience of working with QR code rendering and reading on android, so can complete an app of your demands in short terms and with good quality.
If are interested, please, contact me here or in skype: semenbublyk. Thank you.