Faceted Search System Low-Level Design
6 min read Faceted Search System — Low-Level Design A faceted search system lets users narrow results through multiple filter dimensions simultaneously — […] Read article
System Design
System Design
OAuth Social Login System Low-Level Design
6 min read OAuth Social Login System — Low-Level Design An OAuth social login system allows users to authenticate via a third-party provider Read article
System Design
Shopping Cart Persistence Low-Level Design
6 min read Shopping Cart Persistence — Low-Level Design A shopping cart persistence system stores cart state across sessions and devices, merges guest Read article
System Design
Password Reset Flow Low-Level Design
6 min read Password Reset Flow — Low-Level Design A password reset flow lets users regain account access via a verified email link. Read article
System Design
Time Series Metrics System Low-Level Design
7 min read Time Series Metrics System — Low-Level Design A time series metrics system stores and queries measurements that change over time: Read article
System Design
User Blocking System Low-Level Design
6 min read User Blocking System — Low-Level Design A user blocking system prevents one user from seeing or interacting with another. It Read article
System Design
File Version Control System Low-Level Design
7 min read File Version Control System — Low-Level Design A file version control system tracks the history of changes to files, supports Read article
System Design
Presence System Low-Level Design
6 min read Presence System — Low-Level Design A presence system tracks whether users are online, idle, or offline, and broadcasts status changes Read article
System Design
Live Comments System Low-Level Design
6 min read Live Comments System — Low-Level Design A live comments system streams new comments to all viewers of a piece of Read article
System Design
Mentions and Notifications System Low-Level Design
7 min read Mentions and Notifications System — Low-Level Design A mentions system parses @username references in user content, identifies the mentioned users, Read article
System Design
Circuit Breaker Pattern Low-Level Design
6 min read Circuit Breaker Pattern — Low-Level Design A circuit breaker prevents cascading failures by stopping requests to a failing downstream service. Read article
System Design
Event Deduplication System Low-Level Design
6 min read Event Deduplication System — Low-Level Design An event deduplication system ensures that duplicate events from at-least-once delivery queues are processed Read article
System Design
Chunked File Upload System Low-Level Design
6 min read Chunked File Upload System — Low-Level Design A chunked file upload system breaks large files into smaller pieces, uploads each Read article
System Design
Currency Converter Service Low-Level Design
6 min read Currency Converter Service — Low-Level Design A currency converter service fetches exchange rates from external providers, caches them, and applies Read article
System Design
Geo Search System Low-Level Design
6 min read Geo Search System — Low-Level Design A geo search system finds nearby entities (restaurants, drivers, listings) given a user’s location. Read article