Node.js's event-driven, non-blocking model makes it a strong fit for exactly one kind of workload: lots of concurrent operations that spend more time waiting than computing — API requests, database queries, real-time connections.
Where Node.js is the right call
- REST or GraphQL APIs serving a web or mobile app
- Real-time features — chat, live notifications, collaborative editing
- A JavaScript/TypeScript shop that wants one language end to end
Where it's the wrong call
- CPU-intensive processing — heavy data transformation, video/image processing at scale, complex calculations that block the event loop
- Workloads that genuinely benefit from true parallel processing across cores
For most business apps — the ones with a database, an API layer, and a web or mobile frontend — Node.js is a solid, well-supported default, which is why it's what we build on for most of our custom software work. For the CPU-heavy exception cases, we'll tell you honestly when a different stack fits better.