Backend•8 min read

Building a Real-Time Notification System in Node.js with Firebase

Scaleup Infotech Team

Software & Marketing Agency

Jan 28, 2026

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Building a Real-Time Notification System in Node.js with Firebase

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This guide gives a simple overview of building a real-time notification system in node.js with firebase. If you need help turning the idea into a website, app, or business system, the related Scaleup Infotech services are listed below.

Push notifications are essential for user retention. In this guide, we will set up a Node.js Express server that triggers Firebase Cloud Messaging (FCM) to send notifications.

Step 1: Setup Firebase Admin SDK

javascript

const admin = require("firebase-admin");
const serviceAccount = require("./serviceAccountKey.json");

admin.initializeApp({
  credential: admin.credential.cert(serviceAccount)
});

module.exports = admin;

Step 2: Sending the Notification

javascript

const sendNotification = async (token, title, body) => {
  try {
    const message = {
      notification: { title, body },
      token: token
    };

    const response = await admin.messaging().send(message);
    console.log("Successfully sent message:", response);
  } catch (error) {
    console.log("Error sending message:", error);
  }
};