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API Design System Design Case Studies
5 API Design case studies from Amazon with full breakdowns.
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Companies
Topics
✓ 0Case studiesDifficultyAsked atPractice
Intermediate



Highly Available Software Load Balancer
Intermediate7 min readDistributed SystemsNetworkingAPI Design
Object Storage Service (Amazon S3) with Deduplication
Advanced6 min readStorageDistributed SystemsAPI Design
Offline Multi-Device E-Book Reader (Kindle-style)
Intermediate3 min readStorageAPI DesignCollaboration
Frequently Asked Questions
What is API Design in system design?
API Design is a core system design topic covered in 41 case studies on InterviewSkool. It appears frequently in FAANG interviews, especially at Google, Amazon, and Meta.
How should I prepare API Design 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.
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