This document discusses modernizing traditional Python web applications with Node.js. It describes how Node.js can be used to add real-time capabilities by handling events from the backend and proxying requests to the existing Python/Django application. Specifically, it shows how Node.js can listen to events from Postgres and Salesforce, publish them to Redis, and power a real-time single page app by proxying HTTP requests while handling websockets. The overall architecture allows keeping the existing business logic while adding real-time features without much complexity.