Dear Client, How are you?
I'm a senior Mobile Developer with enough experience of more than +5 years.
I have expertise in Native and Hybrid Mobile Languages such as Android, Swift, Objective C, Ionic, React native, etc...
I have done many projects so I have rich experience in this field.
Especially, I'm very familiar with QR/Bar Code Scan using ZXing, Zbar, Real-Time location tracking using Google MAP API and GPS, Payment function using PayPal, Brain Tree, Stripe, etc...
So I can bring you perfect result as you want.
Let's have a chat to discuss your project more details.
I will satisfy you with my rich experience fully.
Cheers.