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System Design Library

System Design

Learn how to design scalable, testable and reliable systems from a QA and SDET perspective.

6 system design problems

Senior

Design a Scalable Test Automation Platform

Design an automation platform that supports UI, API and integration testing across multiple teams, environments and execution pipelines.

#Automation#Selenium#API#CI/CD#Scalability
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Senior

Design a Distributed Test Execution Engine

Design an execution engine capable of scheduling, distributing and monitoring thousands of automated tests across distributed workers.

#Distributed Systems#Parallel Execution#CI/CD#Scalability
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Senior

Design a Test Data Management Platform

Design a platform that provides reliable, isolated and reusable test data for large-scale automated testing.

#Test Data#API#Database#Automation#Scalability
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Senior

Design a Scalable API Testing Platform

Design an API testing platform supporting functional, contract, integration and regression testing at scale.

#API#Microservices#Contract Testing#CI/CD
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Senior

Design a Performance Testing Platform

Design a distributed performance testing platform capable of generating large workloads and analyzing system behavior.

#Performance#JMeter#Distributed Systems#Observability
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Senior

Design a Scalable Test Reporting System

Design a centralized reporting system that aggregates test results from multiple frameworks, teams and execution environments.

#Reporting#Observability#CI/CD#Data Architecture
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Learn to answer system design questions like a senior QA engineer.

Focus on scalability, reliability, observability, testability and engineering trade-offs.

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