kopilangkahpertama.com is a coffee shop based in Jakarta Indonesia, where coffee buyers can scan the QR on a coffee cup and register for the lottery and win prizes. On another side, Admin can create lotteries, view participants, and generate unique QR codes to print on cups.
Challenging part of admin is that we have to generate unique QR codes and sizes according to the cup of coffee. Also, We have to manage every functionality even if price constraints.
Unique QR system
Random winner picker that can be editable by the admin