Learn system architecture by defending it.

Made redundant and need to study for interviews? I'm with ya.

Drill recalls the ideas. Build makes you apply them under load, faults and a budget — fail a rule in Build and the matching cards land in tomorrow's Drill queue.

Drill

Multiple choice or discuss. Learn the vocab to defend your architecture choices.

204 cards · 166 topics

Build

Take a scenario, wire up an architecture, then turn the traffic up and start breaking things.

7 scenarios · levels 1–4

Free, and yours

No account, no cookies, nothing identifying. Your progress stays in this browser.

No ads, ever

Buy me a coffee if you want to affirm my f u to ads — noting that yes, I am redundant.

Open source

It's on GitHub. Fork it for your own study, or just use it as is. I might even review an issue.