System Design AI

Guided practice

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

All designs 1

Ordered by design number

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

Count min sketchClear filters

82. Design Counting at Scale with Probabilistic Data Structures
Unique visitors, top pages, seen URLs and p99 latency over 10 B events a day with HyperLogLog, Count-Min, Bloom filters and t-digests.
ClassicMedium
Analytics AWS Bloom filter
+3
Count min sketch HyperLogLog t-digest
Worked design
Practice

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