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System Design Case Studies Tracker

14 case studies tagged Fintech 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
Fintech✕Clear all
Highly Reliable Account Balance System (Wallet / Ledger)
5 min readFintechPaymentsDatabases
Intermediate▶ Mock
Credit Card Authorization, Limits and Reporting
4 min readFintechPaymentsReal-time
Advanced▶ Mock
Credit Card Customer Portal
5 min readFintechSecurityAPI Design
Beginner▶ Mock
Entitlement-Aware Agentic Workflow for Portfolio Requests
4 min readAI / MLFintechSecurity
Advanced▶ Mock
Expense Policy and Violation Processing (Rippling)
5 min readFintechDistributed SystemsEvent Driven
Advanced▶ Mock
Low-Latency Holiday Lookup Service
4 min readCachingAPI DesignFintech
Beginner▶ Mock
Real-Time Market Data Distribution and VWAP (Bloomberg)
5 min readFintechReal-timeDistributed Systems
Advanced▶ Mock
Mobile Banking App Backend
3 min readFintechSecurityPayments
Intermediate▶ Mock
Personal Finance Dashboard from Multiple Providers
3 min readFintechAPI DesignCaching
Intermediate▶ Mock
Payment Processing System (Stripe-style)
6 min readPaymentsFintechDistributed Systems
Advanced+1▶ Mock
Portfolio Management System (HLD + DB Design)
3 min readFintechDatabasesAnalytics
Intermediate▶ Mock
Stock Price Alert System
3 min readFintechReal-timeAlgorithms
Intermediate▶ Mock
Stock Trading Platform (Zerodha / Robinhood)
6 min readFintechPaymentsReal-time
Advanced▶ Mock
Virtual Credit Card Service (Capital One)
6 min readFintechPaymentsSecurity
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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