System Design Interview: Ticketing System (Ticketmaster / Concert Tickets)
Ticketing systems for concerts and sports events are famous for their demand spikes: a Taylor Swift concert sells 50,000 tickets […]
System Design
System Design
Learn to design scalable, reliable systems that handle millions of users. System design interviews test your ability to architect real-world applications, considering tradeoffs, scalability, and best practices.
Core Topics:
Scalability: Load balancing, horizontal vs vertical scaling
Storage: Databases (SQL vs NoSQL), caching (Redis, Memcached)
Reliability: Replication, failover, disaster recovery
Performance: CDNs, caching strategies, database indexing
Common Design Questions:
Design URL shortener (bit.ly)
Design rate limiter
Design Twitter/Instagram feed
Design messaging system (WhatsApp)
Design file storage (Dropbox)
Interview Level: Senior engineers (L5+) at FAANG companies. Requires 3-5+ years experience to tackle effectively.
Preparation: Study system design patterns, understand distributed systems fundamentals, and practice mock interviews.
System Design
System Design Interview: Live Streaming Platform (Twitch)
Designing a live streaming platform is fundamentally different from designing video-on-demand (YouTube). The challenge is latency — live content must
System Design
System Design Interview: E-Commerce Product Search (Amazon Scale)
Product search at Amazon or eBay is one of the most complex search systems in the world. It must combine
System Design
System Design Interview: Email System at Gmail Scale
Designing an email system is a favorite at Google (who built Gmail) and at companies that rely heavily on transactional
System Design
System Design Interview: Social Network at Scale (LinkedIn / Facebook)
Social networks combine graph data structures, feed generation, search, and recommendation systems — all at massive scale. This question appears
System Design
System Design Interview: Ride-Sharing App (Uber / Lyft)
Designing a ride-sharing app is a top-5 system design interview question, especially at Uber, Lyft, DoorDash, and Meta. It combines
System Design
System Design Interview: Rate Limiter
Rate limiters protect APIs from overload, prevent abuse, and enforce fair usage. Almost every system design interview that involves an
System Design
System Design Interview: URL Shortener (TinyURL / Bitly)
The URL shortener is one of the most common system design interview questions because it touches every major challenge: unique
System Design
System Design Interview: Notification System (Push, Email, SMS)
Notification systems are invisible infrastructure that every major app depends on. A good design handles multiple channels (push, email, SMS),
System Design
System Design Interview: Apache Kafka Architecture Deep Dive
Apache Kafka underpins event streaming at LinkedIn, Uber, Netflix, Airbnb, and thousands of other companies. Understanding Kafka architecture deeply —
System Design
System Design Interview: Distributed Cache (Redis vs Memcached)
Caching is the first answer to scaling — but designing a correct, consistent caching layer requires careful thought about invalidation,
System Design
Behavioral Interview Questions: STAR Method with Real Examples (2025)
Behavioral interviews determine whether you will be hired as much as technical interviews at most companies. Google calls them “Googleyness,”
System Design
Java Interview Questions: Core Concepts, Concurrency, and JVM (2025)
Java remains the dominant language at Amazon, Google, Goldman Sachs, and most enterprise tech companies. This guide covers the Java
AI/ML Interview Questions, System Design
Data Engineering Interview Questions: Spark, Kafka, and Pipeline Design
Data engineering roles require you to design, build, and maintain data pipelines that move and transform data at scale. Interviews
System Design
System Design Interview: Real-Time Multiplayer Game Backend
Designing a real-time multiplayer game backend is a fascinating system design problem that combines the constraints of ultra-low latency, authoritative