Node.js is already involved more often than people realize
Most Next.js applications already run their server-side code on Node.js under the hood. So "should we use Node.js" is usually really asking a more specific question: do we need a standalone Node backend, separate from the framework's built-in API layer?
When built-in API routes are enough
For most applications — a marketing site with a contact form, a dashboard with moderate backend logic, a small-to-medium SaaS product — API routes inside a framework like Next.js handle the backend needs without a separate service to build, deploy, and maintain.
When a standalone Node.js service makes sense
- The backend needs to run independently of the frontend's deployment lifecycle — different scaling needs, different release cadence
- Real-time features (WebSockets, live updates) that benefit from a dedicated persistent-connection server
- A backend that serves multiple frontends or clients, not just one web app
- Heavy background processing — queues, scheduled jobs, data pipelines — that shouldn't share resources with request-handling code
What Node.js is genuinely good at
High-throughput I/O-bound work — APIs, real-time systems, services that spend most of their time waiting on network or database calls rather than heavy computation. Its non-blocking model handles many concurrent connections efficiently, which is exactly the shape of most web backends.
Where it's not the natural choice
CPU-heavy workloads — video processing, complex numerical computation — are usually a worse fit for Node's single-threaded event loop than for languages built around parallel computation. Most business web applications don't hit this ceiling, but it's worth knowing before committing.
How this plays into cost and timeline
A standalone backend is real additional infrastructure to build, deploy, and maintain — see How Much Does Software Development Cost? for how integration and infrastructure complexity move project cost.
How we build backends
Node.js and PostgreSQL are core to our Web Engineering and Cloud & DevOps work — standalone where the project genuinely needs it, framework-integrated where it doesn't. Tell us what you're building and we'll recommend the right shape.