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Ads System Design Case Studies

2 Ads case studies from TikTok with full breakdowns.

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Companies

Netflix6TikTok2Apple1Meta1Microsoft1Pinterest1Rippling1

Topics

Distributed Systems 90Real-time 51Storage 43Data Pipelines 42API Design 41Databases 38Caching 37Security 32AI / ML 23Algorithms 20Scheduling 20Search 19Event Driven 14Fintech 14Payments 11Geospatial 11Analytics 11Observability 11E-commerce 11Messaging 10CDN 9Concurrency 8Ads 8Frontend 8Booking System 6Networking 5IoT 4Media 3Media Streaming 3Collaboration 3Rate Limiting 2
TikTok✕Ads✕Clear all
Ad Creative Relationship Processing with an External Model API
5 min readAdsData PipelinesAI / ML
Intermediate▶ Mock
Demand-Side Ad Platform: Campaigns, Targeting and Edit History
3 min readAdsDatabasesAPI Design
Intermediate▶ Mock

Frequently Asked Questions

What is Ads in system design?

Ads is a core system design topic covered in 8 case studies on InterviewSkool. It appears frequently in FAANG interviews, especially at Google, Amazon, and Meta.

How should I prepare Ads for system design interviews?

Study the case studies above, focusing on architecture trade-offs, scale estimates, and API designs. Practice explaining your decisions aloud — this is exactly what interviewers evaluate.

Practice with a Mock Interview

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