I have started preparing for system design interviews. I have been collecting materials to study and been bumped with the questions related to designing the components of a e-commerce site and this looks to be a popular question. I am looking for good materials to read up to have a better understanding on designing e-commerce site. Some of the components that I am looking into would be

• Managing shopping cart
• Managing product catalog
• How to design payment gateway / processor

Looking for any suggestions or guidance here

Thank You