Build POS System

I looking to build a POS system to improve the efficiency of our business operations. Aside from the typical functions of a POS system – such as inventory tracking, sales reporting and employee management – I am also keen to explore payment solutions that enable payment by tapping credit cards, inserting card chips, and scanning QR code. I’m not sure how many registers are neededs, so this aspect will be decided later. I want to engage a freelancer on Freelancer.com to build a complete POS system featuring all the functions mentioned above. Thank you for your interest.