System Design AI

Designs

Pick a system. Work through the problem. Compare your approach.

Create your own

Classic designs 1

Ordered by design number

Company tags are community-reported. Counts on cards show how many people reported that design.

Sliding windowsClear filters

43. Design YouTube Top-K
The K most-viewed videos for the last hour, day, month and all time from 700,000 views a second, exactly and in milliseconds.
ClassicMedium
Caching Databases Streaming
+7
Distributed systems AWS Flink Kafka Redis Sliding windows Top-K
Worked design
Practice

Each design brings together the brief, practice, examples and discussion.