A booking system manages time-bounded reservations for finite resources: hotel rooms, airline seats, restaurant tables, or appointment slots. The core […]

Secret management secures sensitive credentials (API keys, database passwords, TLS certificates, encryption keys) throughout their lifecycle: generation, storage, distribution, rotation,

A log aggregation system collects log data from distributed services, centralizes it for storage and search, and provides query and

A media processing pipeline ingests raw media (video, image, audio), transforms it into multiple output formats optimized for different devices

A multi-region architecture deploys services and data across multiple geographic regions to achieve low latency for global users, disaster recovery,

Real-time communication between client and server requires pushing data from server to client without the client repeatedly polling. Three main

A distributed job scheduler executes tasks at specified times or intervals across a cluster of workers. It must handle at-least-once

A feature flag system enables runtime toggling of application features without deploying code. It decouples deployment from release and enables

System design interviews test your ability to think at scale, communicate trade-offs, and structure ambiguity into actionable plans. A repeatable