⏱ 6 min read System Design Fundamentals: CAP Theorem, Consistency, and Availability Understanding distributed systems fundamentals is essential for any system design interview. These […] Read article

⏱ 3 min read System Design Interview: Design a Real-Time Leaderboard (Top-K System) Real-time leaderboards rank users by score and are common in gaming, Read article

⏱ 3 min read System Design Interview: Distributed Transactions (2PC, Saga Pattern) Distributed transactions are one of the hardest problems in distributed systems. When Read article

⏱ 3 min read System Design Interview: Design an Email System (like Gmail) Designing an email system covers distributed storage, message queuing, full-text search, Read article

⏱ 6 min read System Design Interview: Design a Maps and Navigation System (Google Maps) Designing a maps and navigation system is asked at Read article

⏱ 5 min read System Design Interview: Design a Feature Flag System Feature flag (feature toggle) systems allow engineers to enable or disable features Read article

⏱ 3 min read System Design Interview: Design a Live Streaming Platform (Twitch) Designing a live streaming platform like Twitch differs significantly from on-demand Read article

⏱ 3 min read System Design Interview: Design a Ticketing System (like Ticketmaster) Designing a ticket booking system like Ticketmaster tests your ability to Read article

⏱ 3 min read System Design Interview: Design a Search Engine Designing a search engine tests your understanding of inverted indexes, relevance ranking, distributed Read article

⏱ 5 min read What Is a Metrics and Monitoring System? A metrics system collects numerical measurements from services (request rate, error rate, latency, Read article

⏱ 5 min read What Is a Distributed File System? A distributed file system (DFS) stores files across many machines, exposing them as a Read article

⏱ 5 min read What Is an Object Storage System? Object storage (Amazon S3, Google Cloud Storage) stores arbitrary-size files (objects) in named buckets. Read article

⏱ 5 min read What Is an E-commerce Checkout System? The checkout system orchestrates the final steps of an online purchase: cart validation, inventory Read article

⏱ 5 min read What Is a Social Graph? A social graph represents relationships between users: friendships (Facebook), follow relationships (Twitter/Instagram), professional connections (LinkedIn). Read article