Monolithic healthcare cloud architecture integrating user-facing modules (document management, smart calendar, to-do tasks, communication) with a unified REST API backend, PostgreSQL database, and AI-powered document processing pipeline. Frontend applications communicate exclusively via HTTPS/TLS 1.3 to the backend REST API, which enforces authentication, request validation, and rate limiting through a dedicated security module. The architecture includes OCR-triggered document pipelines, vector embeddings for semantic search, and comprehensive logging for audit compliance. Fork this diagram to customize authentication flows, add load balancing, or adapt the AI layer for your healthcare use case.