Frontend system design interviews test your ability to architect client-side applications at scale. Unlike backend system design, you won't discuss databases or load balancers. Instead, you'll design component hierarchies, state management, and user interactions.
These rounds appear at E+ at Meta and L+ at Google. Resources are scarce compared to backend prep.
You'll learn the RADIO framework: Requirements, Architecture, Data Model, Interface, Optimizations. This structured approach works for any frontend design question.