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Questions - System Design

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URL Shortener: Requirements & High-Level Design

URL Shortener: Deep Dives

URL Shortener: Interview Guide

LeetCode: Requirements & High-Level Design

LeetCode: Deep Dives

LeetCode: Interview Guide

Webhook Receiver: Requirements & High-Level Design

Webhook Receiver: Deep Dives

Webhook Receiver: Interview Guide

Tinder: Requirements & High-Level Design

Tinder: Feed and Ranking Deep Dives

Tinder: Swipe and Match Deep Dives

Tinder: Likes, Blocking and Multi-Region Deep Dives

Tinder: Interview Guide

Yelp: Requirements & High-Level Design

Yelp: Search and Ranking Deep Dives

Yelp: Caching and Hotspot Deep Dives

Yelp: Interview Guide

Rate Limiter: Requirements & High-Level Design

Rate Limiter: Shared State and Atomicity Deep Dives

Rate Limiter: Policies, Failures and Hot Keys Deep Dives

Rate Limiter: Interview Guide

Pastebin: Requirements & High-Level Design

Pastebin: Deep Dives

Pastebin: Interview Guide

Realtime Monitoring System: Requirements & High-Level Design

Realtime Monitoring System: Alerting and Dashboards Deep Dives

Realtime Monitoring System: Storage and Scale Deep Dives

Realtime Monitoring System: Interview Guide

Typeahead: Requirements & High-Level Design

Typeahead: Index and Ranking Deep Dives

Typeahead: Serving Deep Dives

Typeahead: Interview Guide

Comment System: Requirements & High-Level Design

Comment System: Reading Deep Dives

Comment System: Voting and Moderation Deep Dives

Comment System: Interview Guide

Twitter: Requirements & High-Level Design

Twitter: Deep Dives

Twitter: Interview Guide

Chat App: Requirements & High-Level Design

Chat App: Delivery Deep Dives

Chat App: Groups and Encryption Deep Dives

Chat App: Interview Guide

Dropbox: Requirements & High-Level Design

Dropbox: Sync Deep Dives

Dropbox: Storage Deep Dives

Dropbox: Interview Guide

YouTube: Requirements & High-Level Design

YouTube: Upload & Processing Deep Dives

YouTube: Delivery Deep Dives

YouTube: Interview Guide

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YouTube: Upload & Processing Deep Dives

YouTube design deep dives on upload and processing — resumable uploads and what a signed URL allows (tested), H.264, VP9 and AV1 measured with VMAF, what a ladder weighs, the task graph and its order, chunked encoding, and keyframe-aligned segments.

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