Topic Guide
System Design
Learn to design scalable systems from scratch. Step-by-step walkthroughs of real interview questions like designing Twitter, Uber, and payment systems.
9 guides in this collection
Design Twitter: A Step-by-Step System Design Walkthrough
Master the Twitter system design interview. Learn to design the feed, handle celebrity users, scale tweet storage, and implement real-time notifications.
Design a URL Shortener: The Complete Guide
Learn to design a URL shortening service like bit.ly. Covers encoding strategies, database selection, caching for read-heavy loads, and analytics at scale.
System Design Interview Framework
Master system design interviews with this proven framework. Learn to clarify requirements, estimate capacity, design APIs, choose databases, and scale effectively.
Design Instagram: A Step-by-Step System Design Walkthrough
Master the Instagram system design interview. Learn to design photo sharing, news feed generation, story features, and scale to billions of users.
Design a Notification System: System Design Interview Guide
Master the notification system design interview. Learn to design push notifications, email, SMS, in-app alerts with priority queues, rate limiting, and user preferences.
Design a Payment System: System Design Interview Guide
Master the payment system design interview. Learn to design payment processing, idempotency, double-entry bookkeeping, fraud detection, and PCI compliance.
Design Spotify: Music Streaming System Design Guide
Master the Spotify system design interview. Learn to design audio streaming, playlist management, recommendation engines, and offline playback at scale.
Design Uber: Ride-Sharing System Design Guide
Master the Uber system design interview. Learn to design ride matching, real-time location tracking, surge pricing, and ETA calculation at scale.
System Design Interview Strategy: A Step-by-Step Framework
Master the system design interview with a proven 4-step framework. Covers requirements, estimation, high-level design, deep dives, trade-offs, and time management.
Ready to Practice?
Apply what you've learned. 1,300+ questions with spaced repetition scheduled for interview day.