6 min read Problem Scope and Requirements JWTs are stateless by design — once issued, they are valid until expiry. A Token Revocation […] Read article
6 min read Problem Scope and Requirements A Key Management Service (KMS) manages cryptographic keys throughout their lifecycle: generation, storage, rotation, and destruction. Read article
6 min read Problem Overview A live auction system allows bidders to compete in real time, with each bid potentially triggering updates for Read article
6 min read Problem Overview An inventory reservation system allows multiple systems (e-commerce checkout, warehouse management, wholesale orders) to place temporary holds on Read article
5 min read Problem Overview A matchmaking service groups players into balanced game sessions based on skill, latency, and preference. The system must Read article
6 min read Problem Overview Game state synchronization keeps all clients and the authoritative server in agreement about the game world in real Read article
6 min read Notification Schema Every notification is a structured record created before any delivery is attempted: notification_id: UUID or Snowflake — unique Read article
7 min read Device Token Storage A device token is a provider-issued opaque string that identifies a specific app install on a specific Read article
5 min read Email Sending Flow The end-to-end path from application event to recipient inbox: Application calls the email service API with recipient, Read article
7 min read Message Schema Every message is a structured record stored durably before any delivery is attempted: message_id: Snowflake ID — 64-bit Read article
7 min read WebRTC Overview WebRTC (Web Real-Time Communication) is a browser and native SDK standard for peer-to-peer audio and video. It handles Read article
7 min read Ingestion Pipeline Raw video files uploaded by content creators or production teams enter a processing pipeline before they can be Read article
6 min read Use Cases Vector search powers applications where semantic similarity matters more than keyword overlap: semantic search over documents, recommendation retrieval Read article
6 min read Pipeline Stages Overview An ML training pipeline moves data through a sequence of well-defined stages: data ingestion, feature engineering, model Read article
6 min read Double-Entry Bookkeeping Every financial transaction in the system uses double-entry bookkeeping: each transaction debits one or more accounts and credits Read article
