Community
How other people built it, and everything you can do on a board. Look around, then clone one and make it yours.
- system-design 21
- interview 16
- beginner 5
- data 4
- marketplace 4
- realtime 4
- backend 3
- media 3
- social 3
- ai 2
- ecommerce 2
- saas 2
- bot 1
- concurrency 1
- ddd 1
- devops 1
- domain 1
- fintech 1
- kubernetes 1
- messaging 1
- mobile 1
- mvp 1
- storage 1
- ui 1
- uml 1
Ride hailing app, like UberMatching riders and drivers: live locations in a geo index, dispatch, surge, trips and payments. A classic system design interview.
Video calls, like ZoomPeer to peer for two, an SFU for a meeting, signaling and what happens on a bad network.
Food delivery, like iFood or DoorDashThree sides at once: customer, restaurant and courier, with one order moving through a state machine.
Chat app, like WhatsAppOne-to-one and group messages: long-lived connections, delivery receipts, offline inboxes and end-to-end encryption.