Why do you use a split-backend (Node / Python)?
Performance. Node.js is built for real-time concurrency — chat, sockets, multi-user dashboards, high-throughput APIs — so we use it where responsiveness matters. Python handles the data-heavy and AI-heavy work: model orchestration, mathematical pipelines, document processing, and integrations with scientific libraries. Splitting these responsibilities means each layer runs on the runtime it was designed for, and the product stays fast as it scales.