Ad Click Tracking System: Low-Level Design
6 min read An ad click tracking system records every click on an advertisement, deduplicates fraudulent clicks, aggregates counts for billing, and provides […] Read article
System Design
System Design
Shopping Cart: Low-Level Design
6 min read A shopping cart stores a user’s intended purchases before checkout. The design must handle: anonymous users (no account), authenticated users Read article
System Design
Distributed Task Queue: Low-Level Design
6 min read A distributed task queue decouples work from workers: producers enqueue tasks, workers consume and execute them asynchronously. This enables horizontal Read article
System Design
Ride-Sharing Platform: Low-Level Design
6 min read A ride-sharing platform (Uber, Lyft) matches riders with nearby drivers in real time, handles surge pricing, tracks vehicle positions, and Read article
System Design
Key-Value Store: Low-Level Design
6 min read A key-value store is the simplest form of a database: store a value associated with a key, retrieve the value Read article
System Design
Ticketing System: Low-Level Design
6 min read A ticketing system (like Ticketmaster for concerts, or an airline seat booking system) manages limited inventory under simultaneous high demand. Read article
System Design
Social Network Feed: Low-Level Design
6 min read A social network feed aggregates posts from accounts a user follows, ranked by relevance or recency. At Instagram or Twitter Read article
System Design
Recommendation System: Low-Level Design
6 min read A recommendation system suggests relevant items to users — products to buy, videos to watch, friends to follow. At Netflix, Read article
System Design
Payments System: Low-Level Design
6 min read A payments system processes financial transactions — charge customers, transfer funds, process refunds. Unlike typical web applications, payments demand ACID Read article
System Design
Search Autocomplete: Low-Level Design
6 min read A search autocomplete system provides real-time suggestions as users type, ranking completions by popularity or relevance. At Google or Amazon Read article
System Design
File Storage System: Low-Level Design
6 min read A file storage system (like Dropbox or Google Drive) stores user files, provides sync across devices, and handles concurrent edits. Read article
System Design
Video Streaming Platform: Low-Level Design
6 min read A video streaming platform (like Netflix or YouTube) must ingest raw video, encode it into multiple quality levels, distribute it Read article
System Design
Notification System: Low-Level Design
6 min read A notification system delivers messages to users through one or more channels — push notifications, email, SMS, in-app. At scale Read article
System Design
URL Shortener: Low-Level Design Deep Dive
6 min read A URL shortener converts a long URL into a short alias (e.g., bit.ly/abc123) that redirects to the original. Building one Read article
System Design
Time Series Database: Low-Level Design
5 min read A time series database (TSDB) is optimized for storing and querying time-stamped data — metrics, sensor readings, financial prices, event Read article