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System Design Case Studies Tracker

20 case studies tagged Algorithms with full breakdowns.

176case studies
30companies
31topics
~5 minaverage read

Companies

Meta28Microsoft27Amazon23OpenAI23Google20TikTok16Anthropic15Salesforce15Apple12Uber12Atlassian11JPMorgan11LinkedIn11Goldman Sachs9Netflix9Oracle9Snowflake9Rippling8Airbnb7Bloomberg7Capital One7Databricks7Walmart7Flipkart6NVIDIA6Pinterest6Roblox6Adobe4Visa4Anduril1

Topics

Distributed Systems 90Real-time 51Storage 43Data Pipelines 42API Design 41Databases 38Caching 37Security 32AI / ML 23Algorithms 20Scheduling 20Search 19Event Driven 14Fintech 14Analytics 11E-commerce 11Geospatial 11Observability 11Payments 11Messaging 10CDN 9Ads 8Concurrency 8Frontend 8Booking System 6Networking 5IoT 4Collaboration 3Media 3Media Streaming 3Rate Limiting 2
Algorithms✕Clear all
Shazam
14 min readSearchReal-timeAlgorithms
Advanced—▶ Mock
Ad Budget Pacing System
5 min readAdsReal-timeDistributed Systems
Advanced▶ Mock
Real-Time Collaborative Editor (Google Docs / Sheets)
7 min readCollaborationReal-timeDistributed Systems
Advanced▶ Mock
Inventory Serving on Spinning Disks with Little RAM
5 min readStorageDatabasesAlgorithms
Advanced▶ Mock
Distributed Crossword Solver
6 min readAlgorithmsDistributed SystemsScheduling
Advanced▶ Mock
Finding the Mode of Data Spread Across Many Machines
4 min readAlgorithmsDistributed SystemsData Pipelines
Intermediate▶ Mock
Duplicate File Detection at Scale
6 min readStorageAlgorithmsDistributed Systems
Intermediate▶ Mock
Expense Policy and Violation Processing (Rippling)
5 min readFintechDistributed SystemsEvent Driven
Advanced▶ Mock
Sorting a 500 GB CSV with 16 GB of RAM (External Merge Sort)
4 min readAlgorithmsStorageData Pipelines
Intermediate▶ Mock
Flight Search Platform (Google Flights / Kayak)
4 min readSearchCachingData Pipelines
Advanced▶ Mock
Storing a Hierarchy and Returning All Descendants
4 min readDatabasesAPI DesignAlgorithms
Intermediate▶ Mock
Word Store with Lexicographic Range Queries
4 min readStorageAlgorithmsDatabases
Intermediate▶ Mock
Matching Tagged Problems to Skilled Programmers at Scale
4 min readAlgorithmsDistributed SystemsScheduling
Advanced▶ Mock
PDF Viewer Search Box that Cycles Through Matches (React)
4 min readFrontendAlgorithmsConcurrency
Intermediate▶ Mock
Social Post Search (Keyword and Boolean Queries)
6 min readSearchDistributed SystemsAlgorithms
Intermediate▶ Mock
Scaling a Rules Engine for High Traffic (Rippling)
3 min readDistributed SystemsAlgorithmsEvent Driven
Advanced▶ Mock
Stock Price Alert System
3 min readFintechReal-timeAlgorithms
Intermediate▶ Mock
Surge (Dynamic) Pricing for Ride-Hailing
4 min readReal-timeGeospatialAlgorithms
Advanced▶ Mock
Top-K Trending Items (Heavy Hitters)
7 min readAnalyticsReal-timeAlgorithms
Advanced+4▶ Mock
Typeahead / Search Autocomplete
6 min readSearchCachingData Pipelines
Intermediate▶ Mock

Frequently Asked Questions

What are system design case studies?

System design case studies are real-world architecture problems broken down into structured breakdowns. Each case study covers requirements, high-level design, scale estimates, API designs, and deep dives into key components.

How many system design case studies should I prepare?

For FAANG interviews, preparing 15-20 case studies covering core topics like caching, load balancing, and database sharding is recommended. Focus on understanding trade-offs rather than memorizing solutions.

Which companies ask system design case studies?

All FAANG companies (Google, Amazon, Meta, Apple, Microsoft) plus top tech companies like Netflix, Uber, and Airbnb ask system design case studies. Senior-level interviews almost always include at least one system design round.

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