Low Level Design: Returns and Refunds Service
11 min read Overview A returns and refunds service handles the reverse logistics of e-commerce: accepting return requests, authorizing them against policy, routing […] Read article
System Design
System Design
Low Level Design: Batch Processing Framework
11 min read What Is a Batch Processing Framework? A batch processing framework executes large-scale data transformation jobs over finite datasets on a Read article
System Design
Low Level Design: Rate Limiter Service
10 min read What Is a Rate Limiter Service? A rate limiter controls how often a client can call an API or consume Read article
System Design
Low Level Design: File Sync Service
10 min read Overview A file sync service keeps files on multiple devices in sync: a user creates a file on their laptop Read article
System Design
Low Level Design: Email Template Engine
12 min read Overview An email template engine is a system for defining, versioning, rendering, and testing email content at scale. It must Read article
System Design
Low Level Design: SMS Gateway
11 min read Overview An SMS gateway is the internal service that abstracts one or more upstream SMS providers (Twilio, Nexmo/Vonage, AWS SNS, Read article
System Design
Low Level Design: Push Notification Service
9 min read Overview A push notification service delivers real-time messages to mobile and web clients via platform gateways: Apple Push Notification service Read article
System Design
Low Level Design: Container Registry
10 min read What Is a Container Registry? A container registry is a storage and distribution system for container images. It stores named, Read article
System Design
Low Level Design: Travel Itinerary Service
5 min read What Is a Travel Itinerary Service? Users plan and manage multi-component trips: flights, hotels, car rentals, and activities stitched together Read article
System Design
Low Level Design: Flight Search Service
4 min read What Is a Flight Search Service? A flight search service aggregates schedules and prices from airlines or GDS providers, lets Read article
System Design
Low Level Design: Surge Pricing Service
5 min read What Is a Surge Pricing Service? Surge pricing (dynamic pricing) automatically adjusts ride fares based on real-time supply and demand Read article
System Design
Low Level Design: Supply-Demand Balancing Service
4 min read What Is a Supply-Demand Balancing Service? A supply-demand balancing service continuously monitors the ratio of available drivers (supply) to outstanding Read article
System Design
Low Level Design: Driver Matching Service
4 min read What Is a Driver Matching Service? A driver matching service is the real-time system responsible for pairing a rider’s trip Read article
Videos
Low Level Design: ETA Prediction Service
4 min read What Is an ETA Prediction Service? An ETA (Estimated Time of Arrival) prediction service answers the question: given a route Read article
Videos
Low Level Design: Turn-by-Turn Navigation Service
4 min read What Is Turn-by-Turn Navigation? A turn-by-turn navigation service accepts an origin and destination, computes an optimal route through the road Read article
