Real-world systems Pick a system

Learn system design with real-world things

Pick an app you use every day.
Scroll and Explore

Start with a delivery app See all systems
1

Follow one person

Riya orders a mosquito bat. You see every screen she taps.

2

Watch it grow

The same tap at three sizes. Each jump breaks something, and you see the fix.

3

Test yourself

A short quiz with hints and a notes page, built on real AWS services.

Pick a system

Live

Ecommerce: a 10-minute delivery

From the home screen to the doorbell. Search, cart, payment, the warehouse, the rider, and everything between.

  • 11 steps
  • 3 sizes
  • Quiz
Open the story
Coming soon

Another everyday system

A new story is being written. Check back soon.

Coming soon

And another

More are on the way, one at a time.