Design an Online Shop Checkout · System Design Interview

Design an Online Shop CheckoutDesign the cart and checkout of an online shop: people fill a basket, place an order, pay and get a confirmation, and nobody is charged for stock that is not there.What it has to do

A cart keeps its items across devices, and when a guest signs in

Placing an order reserves the stock, charges the card and confirms the order

A failed or timed-out payment leaves no half-placed order and no stock locked for good

Scale

Orders per day: 2 million

Orders per second at peak: 1,500 during a sale

Out of scope

Product search and the catalogue

Shipping and delivery tracking

Refunds and returns

Fraud detection

Taxes and promotions

Practise this challengeAll system design challenges

LetsDiscuss

Loading your session…