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🖥️ Frontend System Design

Architect production-scale frontend systems — feeds, chat, video, Kanban — using the 6-step framework.

Goal

Apply the framework to any frontend design question, defend rendering/state/perf decisions under follow-up.

Frontend System Design Framework

A 6-step framework for frontend system design interviews — requirements, architecture, component tree, data flow, performance, and trade-offs.

medium ⏱ 22m 02

FSD: Design a Social News Feed

Design the frontend of a social news feed — infinite scroll, virtualization, optimistic likes, real-time updates, and performance at scale.

hard ⏱ 30m 03

FSD: Design a Real-Time Chat Widget

Design a real-time chat widget — WebSocket architecture, message state, optimistic sending, read receipts, reconnection, and accessibility.

hard ⏱ 32m 04

FSD: Design a Kanban / Drag-and-Drop Board

Design a Kanban board — column/card data model, drag-and-drop with optimistic reorder, virtualized columns, and undo/redo.

hard ⏱ 30m 05

FSD: Design a Video Player

Design a custom video player — controls, buffering, adaptive streaming (HLS), keyboard shortcuts, accessibility, and performance.