⏱ 7 min read Overview In a low level design interview for a data anonymization service, structure your answer around the pipeline stages: detect, […] Read article

⏱ 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

⏱ 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

⏱ 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

⏱ 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

⏱ 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

⏱ 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

⏱ 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

⏱ 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

⏱ 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

⏱ 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

⏱ 6 min read What Is a Supply Chain Management Service? A supply chain management (SCM) service coordinates the flow of goods from suppliers Read article

⏱ 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

⏱ 5 min read What Is a Gift Card Service? A gift card service handles the full lifecycle of stored-value cards: issuance, activation, balance Read article

⏱ 7 min read An expense management system handles the full lifecycle of employee expenses: from receipt capture in the field to reimbursement hitting Read article