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Backend

Express

A lean, flexible framework for APIs and web services.

What is Express?

Express is the lean, flexible veteran among Node frameworks and has been in use for many years. The whole model revolves around middleware, a chain of small functions that a request passes through one after another. That leaves you in full control of every step, from authentication through logging to error handling. It is exactly this plainness that makes it the natural choice when an API should come together with little overhead and friction.

More in the documentation

How we use it

We use Express when a service can stay small and self-contained or sits as a lean proxy in front of other systems. You start with little and plug in exactly the middleware you actually need. That keeps the footprint small and the onboarding short for everyone on the team.

ts
import express from "express";

const app = express();
app.use(express.json());

app.get("/health", (req, res) => {
  res.json({ status: "ok" });
});

app.listen(3000);
middleware chain with a json route

Good to know

Errors from async handlers do not reach your error handler automatically in Express; they have to be passed on actively. We wrap async routes in a small helper that forwards every reject to next, so no error gets swallowed silently.

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More tools we work with in the same area.

Which technology fits you?

You don't have to decide that, it's our job. Tell us about your plans.