Hello Sir, I'm pleased to inform you that we have already developed several Restaurant POS projects with the web, desktop, Android, Tablet, iPhone, and Android.
I have read your requirements and understood that you are looking for an experienced developer to develop an App for POS handheld printer device.
About POS knowledge we are experts because we are working for the last 16 years in POS.
Can you please open chat with me then we can discuss further and we will explain to you about our past POS project.
Awaiting for your reply and move further.
Best Regards
Bharat