One day, I made a POS that I only saw in a store! While creating POS, there were many challenging tasks such as complex status management in the order/payment process, connecting with hardwares like payment terminal machines and receipt printers. I'd like to share my experience with you about the difficulties and how I solved them, especially about the process of printing the receipts. https://2022.jsconf.kr/en/speakers/seok-ju-na Seokju Na is a developer interested in creating stuff using web technology. He also enjoys working on open source.