System Design

⏱ 7 min read Two Graph Models The first design decision is the relationship model: Directed graph (Twitter/Instagram follow): A follows B does not […] Read article

⏱ 6 min read An e-commerce platform touches nearly every backend concept that appears in system design interviews: relational data modeling, inventory consistency, distributed Read article

⏱ 6 min read Typeahead search (also called autocomplete) is one of the most latency-sensitive features in a modern product. Users expect suggestions to Read article

⏱ 8 min read A proximity service answers “find all restaurants / drivers / users within R km of this location” with low latency Read article

⏱ 9 min read A ticket booking system like Ticketmaster must handle concurrent seat selection, hold expiry, payment confirmation, and flash sale traffic spikes. Read article

⏱ 8 min read Requirements A gaming leaderboard system must support: Update a player’s score in real-time (on match completion) Query a player’s current Read article

⏱ 8 min read Overview A search engine has four major subsystems working in a pipeline: a web crawler fetches pages from the internet, Read article

⏱ 9 min read Requirements Design a live video streaming platform comparable to Twitch or YouTube Live. Key requirements: support millions of concurrent viewers Read article

⏱ 9 min read What is Event-Driven Architecture In event-driven architecture (EDA), services communicate by publishing and consuming events rather than making direct synchronous Read article

⏱ 10 min read Analytics Data Pipeline System Design Analytics pipelines move raw events from user actions into queryable dashboards. The core challenge: volume Read article

⏱ 10 min read Recommendation System Low-Level Design Recommendation systems are one of the highest-ROI components in consumer products. They solve the discovery problem: Read article

⏱ 8 min read What a CDN Does A Content Delivery Network serves content from geographically close edge nodes, dramatically reducing latency. A request Read article

⏱ 8 min read Core Concepts A stock exchange at its core is a system that matches buyers and sellers. The central data structure Read article

⏱ 10 min read Message queues like Kafka, RabbitMQ, and SQS show up in both system design and low-level design interviews. Understanding the internals Read article