System Design AI

Guided practice

Start with a template. Work through each step. Ask Coach when you need a second opinion.

Designs with worked examples 1

Ordered by design number

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

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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

Self-paced by default. Your answers and canvas stay private. AI feedback runs only when you ask for it.