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System Design Case Studies Tracker

32 case studies tagged Security 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
Security✕Clear all
Coupon Distribution System
7 min readDistributed SystemsSecurityEvent Driven
Advanced—▶ Mock
Access Control System (RBAC + Resource Permissions)
6 min readSecurityDatabasesAPI Design
Intermediate▶ Mock
Reviewing an Existing Architecture for Risks
6 min readDistributed SystemsSecurityObservability
Intermediate▶ Mock
Multi-Tenant Audit Logs Service
4 min readSecurityStorageData Pipelines
Intermediate▶ Mock
Cloud Development Environment (Codespaces / Replit / DevBox)
7 min readDistributed SystemsSecurityScheduling
Advanced▶ Mock
Content Moderation System (Harmful Post Detection)
6 min readAI / MLSecurityData Pipelines
Advanced▶ Mock
Credit Card Authorization, Limits and Reporting
4 min readFintechPaymentsReal-time
Advanced▶ Mock
Credit Card Customer Portal
5 min readFintechSecurityAPI Design
Beginner▶ Mock
Enterprise AI Agent for a Global Company
5 min readAI / MLSecurityDistributed Systems
Advanced▶ Mock
Entitlement-Aware Agentic Workflow for Portfolio Requests
4 min readAI / MLFintechSecurity
Advanced▶ Mock
First-Time Kubernetes Deployment in a New Cloud
4 min readDistributed SystemsSecurityNetworking
Intermediate▶ Mock
Governed Data Service for Downstream Consumers
3 min readAPI DesignData PipelinesSecurity
Intermediate▶ Mock
High-Volume Healthcare Data Ingestion Pipeline
4 min readData PipelinesSecurityStorage
Advanced▶ Mock
Hosting Many Websites on One Server with One IP Address
4 min readNetworkingSecurityDistributed Systems
Beginner▶ Mock
Automated Jira-Ticket-to-Pull-Request System
4 min readAI / MLSchedulingDistributed Systems
Advanced▶ Mock
Large File Upload and Processing Pipeline
7 min readStorageData PipelinesSecurity
Intermediate▶ Mock
Guardrails and Fallbacks for Reliable LLM Systems
4 min readAI / MLSecurityDistributed Systems
Intermediate▶ Mock
Malicious IP and URL Detection Service
5 min readSecurityReal-timeCaching
Advanced▶ Mock
Mobile Banking App Backend
3 min readFintechSecurityPayments
Intermediate▶ Mock
Multi-Tenant Data Ingestion and Processing Platform
4 min readData PipelinesDistributed SystemsSecurity
Advanced▶ Mock
Multi-Vendor Integration Platform (Connectors for Email, Slack, CRMs)
4 min readAPI DesignSecurityEvent Driven
Intermediate▶ Mock
Multimodal RAG Assistant over an Internal Knowledge Base
4 min readAI / MLSearchData Pipelines
Advanced▶ Mock
Offline Multi-Device E-Book Reader (Kindle-style)
3 min readStorageAPI DesignCollaboration
Intermediate▶ Mock
Online Judge and Coding Contest Platform (LeetCode)
6 min readDistributed SystemsSecurityScheduling
Intermediate▶ Mock
Post Privacy and Visibility System (Facebook-style)
4 min readSecurityDistributed SystemsCaching
Advanced▶ Mock
Prompt Sharing Platform
5 min readAI / MLSecurityDatabases
Intermediate▶ Mock
Enterprise Remote Browser Isolation System
3 min readSecurityDistributed SystemsScheduling
Advanced▶ Mock
Secure Multi-Tenant API for an Enterprise AI Copilot
4 min readAI / MLSecurityAPI Design
Advanced▶ Mock
Secure Internal Web App for Sensitive Financial Data
4 min readSecurityAPI DesignDatabases
Intermediate▶ Mock
Security Monitoring Framework for Cloud Infrastructure
4 min readSecurityObservabilityData Pipelines
Advanced▶ Mock
Virtual Credit Card Service (Capital One)
6 min readFintechPaymentsSecurity
Intermediate▶ Mock
Voting System APIs and Data Model
3 min readAPI DesignDatabasesSecurity
Beginner▶ 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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