Problem Overview A live auction system allows bidders to compete in real time, with each bid potentially triggering updates for […]

Problem Overview Game state synchronization keeps all clients and the authoritative server in agreement about the game world in real

Problem Overview A matchmaking service groups players into balanced game sessions based on skill, latency, and preference. The system must

Email Sending Flow The end-to-end path from application event to recipient inbox: Application calls the email service API with recipient,

Device Token Storage A device token is a provider-issued opaque string that identifies a specific app install on a specific

Notification Schema Every notification is a structured record created before any delivery is attempted: notification_id: UUID or Snowflake — unique

Ingestion Pipeline Raw video files uploaded by content creators or production teams enter a processing pipeline before they can be

WebRTC Overview WebRTC (Web Real-Time Communication) is a browser and native SDK standard for peer-to-peer audio and video. It handles

Message Schema Every message is a structured record stored durably before any delivery is attempted: message_id: Snowflake ID — 64-bit

Use Cases Vector search powers applications where semantic similarity matters more than keyword overlap: semantic search over documents, recommendation retrieval

Pipeline Stages Overview An ML training pipeline moves data through a sequence of well-defined stages: data ingestion, feature engineering, model

Double-Entry Bookkeeping Every financial transaction in the system uses double-entry bookkeeping: each transaction debits one or more accounts and credits

Form Schema A form is defined as a document with ordered questions, each with a type and optional configuration: forms

Event Schema The event is the core entity. It supports single and recurring events, multiple attendees, and rich metadata: events

Contact Schema A contact represents a person or organization owned by a user. Multi-value fields (phones, emails, addresses) are stored