System Design

⏱ 6 min read A notification system is asked at almost every senior system design interview because it surfaces real architectural challenges: fanout at […] Read article

⏱ 6 min read Designing a ride-sharing app is a rich system design problem that tests your ability to handle real-time location data, geospatial Read article

⏱ 6 min read Video streaming is one of the most infrastructure-intensive system design problems. YouTube streams 1 billion hours of video per day. Read article

⏱ 6 min read Designing a social media feed is one of the most nuanced system design problems you’ll encounter in interviews. It looks Read article

⏱ 7 min read A chat system is a perennial system design interview question. It requires you to reason about real-time communication, persistent storage, Read article

⏱ 5 min read Every system you design needs an API. In system design interviews, choosing the right API style — and explaining why Read article

⏱ 6 min read “Which database would you use?” is one of the most common follow-up questions in system design interviews. Many candidates default Read article

⏱ 6 min read Designing a URL shortener is one of the most common system design interview questions, especially at the intern and new Read article

⏱ 7 min read Caching is the single highest-leverage optimization in most system designs. Before you reach for database sharding or complex infrastructure, a Read article

⏱ 6 min read Message queues decouple the components of a distributed system so that producers and consumers can operate independently. They appear in Read article

⏱ 6 min read A load balancer sits in front of a pool of servers and distributes incoming requests across them. It is one Read article

⏱ 5 min read The CAP theorem comes up in almost every senior-level system design interview. Interviewers ask it because it forces you to Read article

⏱ 5 min read Database sharding is a core scaling technique you’ll need to explain in nearly any large-scale system design interview. The question Read article

⏱ 5 min read Consistent hashing is one of the most commonly asked system design concepts at big tech companies. You will almost certainly Read article