System design has tonnes of YT videos. Watch them. https://m.youtube.com/@SDFC https://m.youtube.com/@SDFC https://www.youtube.com/@jordanhasnolife5163 https:

System design has tonnes of YT videos. Watch them. https://m.youtube.com/@SDFC https://m.youtube.com/@SDFC https://www.youtube.com/@jordanhasnolife5163 https://www.youtube.com/@jordanhasnolife5163 Pricer would have some kind of human interface. Even if just CLI that called API endpoint using some kind of SSO staff authentication. Then it is just a back end.