Low Level Design: Transactional Outbox Pattern
6 min read The transactional outbox pattern solves one of the most common reliability problems in microservices: how to write to a database […] Read article
System Design
System Design
Low Level Design: Data Anonymization Service
7 min read Overview A data anonymization service transforms raw datasets containing personally identifiable information (PII) into privacy-safe versions that can be used Read article
System Design
Low Level Design: Distributed Caching Layer
6 min read What Is a Distributed Caching Layer? A distributed caching layer sits between your application and its primary data store, serving Read article
System Design
Low Level Design: Dynamic Pricing Engine
6 min read A dynamic pricing engine adjusts prices in real time based on demand signals, inventory, and business rules. The design must Read article
System Design
Low Level Design: Gaming Matchmaking Service
5 min read A matchmaking service pairs players into balanced, low-latency game sessions. The design touches skill rating systems, queue management, match formation Read article
System Design
Low Level Design: Session Replay Service
6 min read A session replay service records a user’s browser interactions and reconstructs them for playback — enabling UX debugging, funnel analysis, Read article
System Design
Low Level Design: Thumbnail Generation Service
6 min read A thumbnail generation service converts uploaded images into resized, optimized variants for display at different sizes across web and mobile Read article
System Design
Low Level Design: Media Upload Service
6 min read A media upload service handles ingesting user files — images, video, audio, documents — reliably and at scale. The design Read article
System Design
Low Level Design: Audit Log Service
6 min read Overview An audit log service provides an authoritative, tamper-evident record of who did what to which resource and when. It Read article
System Design
Low Level Design: Investment Portfolio Tracker
6 min read Problem Statement Design an investment portfolio tracker that stores positions, pulls real-time price feeds, calculates gain/loss, alerts on rebalancing drift, Read article
System Design
Low Level Design: Crypto Exchange Order Book
6 min read Problem Statement Design the order book engine for a crypto exchange: handle limit and market orders, match them using price-time Read article
System Design
Low Level Design: Peer-to-Peer Payment Service
5 min read Problem Statement Design a peer-to-peer payment service that lets users send money to one another, link external bank accounts, and Read article
System Design
Low Level Design: Delivery Tracking Service
6 min read What Is a Delivery Tracking Service? A delivery tracking service monitors the lifecycle of a shipment from pickup through final Read article
System Design
Low Level Design: Ride-Share Driver-Rider Matching
6 min read What Is a Ride-Share Matching System? A ride-share matching system pairs riders who need a trip with nearby available drivers. Read article
System Design
Low Level Design: Promotional Code Engine
6 min read What Is a Promotional Code Engine? A promotional code engine generates discount codes, enforces usage rules, validates eligibility at checkout, Read article