System Design·60 minMembers

Ads Frequency Cap / Limiter

Members only

Design a system that enforces per-user / per-campaign ad frequency caps, often with special handling for strict one-ad caps and budget smoothing. The round expects a deep dive into Redis atomicity, qu...

SWE

Infra Eng

ads

rate-limiting

redis

kafka

scaling

idempotency

distributed-systems

hard

Frequency

High

Last asked

2026-08-21

Stage

onsite-system-design

Comments