Topic Guide
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
Master the Twitter system design interview. Learn to design the feed, handle celebrity users, scale tweet storage, and implement real-time notifications.
Learn to design a URL shortening service like bit.ly. Covers encoding strategies, database selection, caching for read-heavy loads, and analytics at scale.
Master system design interviews with this proven framework. Learn to clarify requirements, estimate capacity, design APIs, choose databases, and scale effectively.
Master the Instagram system design interview. Learn to design photo sharing, news feed generation, story features, and scale to billions of users.
Master the notification system design interview. Learn to design push notifications, email, SMS, in-app alerts with priority queues, rate limiting, and user preferences.
Master the payment system design interview. Learn to design payment processing, idempotency, double-entry bookkeeping, fraud detection, and PCI compliance.
Master the Spotify system design interview. Learn to design audio streaming, playlist management, recommendation engines, and offline playback at scale.
Master the Uber system design interview. Learn to design ride matching, real-time location tracking, surge pricing, and ETA calculation at scale.
Master the system design interview with a proven 4-step framework. Covers requirements, estimation, high-level design, deep dives, trade-offs, and time management.
Apply what you've learned. 1,300+ questions with spaced repetition and adaptive difficulty.