Frontend System Design
The ultimate test at staff+ level. The RADIO framework, requirements analysis, rendering strategy selection, data model design, and practicing with real system design cases from news feeds to collaborative editors.
The structured approach to frontend system design interviews. Master Requirements, Architecture, Data model, Interface definition, and Optimizations — the framework FAANG interviewers actually expect.
The first 5 minutes of a frontend system design interview determine everything. Learn to extract functional and non-functional requirements, define scope, identify user personas, and establish constraints like a staff engineer.
CSR, SSR, SSG, ISR, streaming SSR, RSC, PPR, Islands, Resumability — when to use each, why, and how to mix them within a single app for optimal performance.
How to design client-side data models, choose the right API pattern, and build state architectures that scale. The decisions that separate junior frontends from staff engineers.
A complete frontend system design walkthrough for a news feed using the RADIO framework. Covers component architecture, data modeling, API contracts, virtualization, real-time updates, and production-grade optimizations.
Design a production-grade autocomplete search component from scratch using the RADIO framework. Covers debouncing, ARIA combobox, AbortController, LRU caching, trie-based local matching, and keyboard navigation — the way Google, Algolia, and Cmd+K palettes actually work.
A complete RADIO framework case study for designing a real-time chat application like Slack, Discord, or WhatsApp Web — from requirements gathering to production-grade optimizations.
A complete RADIO framework breakdown of designing a real-time collaborative editor like Google Docs, Notion, or Figma. Covers OT vs CRDTs, editor architecture, conflict resolution, presence awareness, and local-first optimizations.
A complete RADIO framework breakdown of designing a video streaming UI like YouTube, Netflix, or Twitch — from manifest parsing to adaptive bitrate switching to accessible custom controls.
Design a production-grade browser-based code editor from scratch using the RADIO framework. Architecture decisions behind VS Code for Web, CodeSandbox, Replit, and StackBlitz — from keystroke latency to collaborative editing.