System design examples

Interactive system design examples, from well-known products to classic designs. Click through each one and follow a request hop by hop.

What happens when you type a URL into your browser: DNS finds the server, TCP and TLS connect securely, a CDN serves the page.

How a food delivery app works: which restaurants can reach you, predicting prep and delivery time, and assigning delivery partners.

Live driver locations, matching through a geospatial index, and surge pricing.

Turns long links into short ones and redirects fast, with a cache in front of the database.