Node.js runs the backend.

Node.js is the runtime for everything we build in JavaScript and TypeScript. Next.js API routes, SvelteKit server endpoints, Express services, and build tooling all run on Node. We use it for server-side rendering, background jobs, webhook handlers, email sending, and PDF generation. The single-language advantage is real.our team writes TypeScript on both sides of the network boundary, shares validation logic between client and server, and uses the same testing tools everywhere. We run Node 24 LTS in production.

Node.js means one language for the full stack. A developer working on a React component can also write the API route that feeds it data, the webhook that processes a Stripe payment, and the email template that confirms the purchase. No context switching between languages, no separate toolchains, no impedance mismatch. The npm ecosystem provides battle-tested solutions for nearly every backend need, and the async I/O model handles concurrent requests efficiently without threading complexity.