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Updated: Apr 1, 2026
Getting Started: A Beginner's Guide to Building Microservices with Node.js
Verified Expert in Cloud-Native Engineering
Dhaval Dave, Radixweb's VP - Ops & Delivery has 18+ years of expertise in cloud software engineering.
Quick Summary: Node.js microservices break a monolithic application into small, independently deployable services that communicate through APIs. Node.js is the preferred runtime for microservices in 2026 because its non-blocking I/O model handles thousands of concurrent requests efficiently. Companies like Netflix, Uber, and PayPal run microservices architectures on Node.js at production scale. This guide covers architecture design, framework selection (NestJS vs Express), Docker deployment, service communication patterns, and security best practices.
In 2026, over 85% of organizations are adopting microservices as part of their modernization strategy. Node.js has become the leading runtime for microservices development because it handles high-concurrency, I/O-bound workloads better than most alternatives. Whether you are migrating a monolith or architecting a new distributed system, this guide gives you a practical, production-grade path from first service to full deployment.
We know, with the surging size of the JavaScript application, the challenges that you face also increase simultaneously. And that’s why Microservices Architecture is introduced to solve this issue. Utilizing microservices has become the most preferred practice in the software development industry.
Applications that are scalable, resilient, and maintainable can be created using the powerful architectural style of microservices. Node.js is a suitable platform for developing microservices, thanks to its efficient and lightweight nature, and an active package ecosystem.
We will learn to develop robust, scalable and efficient microservices for server-side programming in Node.js using this guide. Stay ahead in this competition by embracing Node.js development services for microservices.
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Introduction
Developing software applications is not only about fulfilling the requirements of clients and integrating essential features. With the large complex application size, there are some challenges and roadblocks developers have to face, including code maintenance, bug fixing, new feature implementation, and managing user roles.
However, these are essential issues at scale, and developers are only left with adapting other architecture in order to avoid them.
Generally, monolithic architecture-based applications encounter these problems. The entire system is affected if any particular component in a monolithic system develops an issue. And that’s when distributed systems come to the rescue to overcome the challenges developers have faced. The complexity can easily be resolved when JavaScript applications are built on microservices, with the Node.js ecosystem.
A distributed application comprises numerous loosely coupled microservices that collaborate to satisfy the user's demands. Microservices is one type of distributed system which provides a solution to this issue, empowering developers to build application components independently. With the adoption of microservices, the occurrence of a fault in one component no longer compromises the overall functionality of the software application.
“Microservices are fine-grained SOA components. They are lightweight services with a narrow focus.” - Ajay Ojha, Chief Architect at Radixweb
What Are Node.js Microservices?
Microservices are a Service-Oriented Architecture (SOA) style where the application structure comprises interconnected services. The application developed using the microservices architecture consists of lightweight protocols.
In a nutshell, microservices is a software architecture comprising single, manageable services. It’s a software architecture approach that breaks down complex applications into independent components. These individual components interact with each other through well-defined APIs to provide efficient functionality.
Each microservice has a loosely linked architecture aiming to simplify the process of creating and maintaining applications. Microservices provide rapid service development, testing, and deployment, enabling independent operation of each service.
That’s why microservices are becoming more popular in software application development. Every software engineer is on the verge of adopting microservices architecture to improve the software quality they build.
Monolithic vs Microservices in Node.js
The table below shows the key differences between monolithic and microservices architecture across the dimensions that matter most for Node.js projects
| Factor | Monolithic Architecture | Microservices Architecture |
|---|---|---|
| Deployment | All modules deploy together | Each service deploys independently |
| Scalability | Scale the entire application | Scale individual services on demand |
| Fault Isolation | One failure affects the whole system | Failures are contained to one service |
| Technology Choice | Single language and framework | Each service can use a different stack |
| Team Structure | One large team on one codebase | Small autonomous teams per service |
| Development Speed | Slows down as codebase grows | Stays fast regardless of total system size |
| Maintenance Cost | Increases significantly with complexity | Distributed but bounded per service |
When it comes to following microservices architecture and developing a complex application, Node.js becomes the primary choice for every developer and business owner. NodeJS is an open-source, cross-platform runtime environment that helps developers to run JavaScript on the server-side.
Additionally, Node.js architecture follows an event-driven approach, which helps the application handle asynchronous I/O and manage huge traffic.
Node.js microservices is what you need to build dynamic, complex, and real-time applications.
Microservices in the Real World
While talking about what is microservices architecture, these are small application components that are specialized in performing one task and work collaboratively to achieve a higher-level task.
The world's most-used platforms operate on Node.js microservices at scale:
- Netflix runs over 700 independent microservices, each deployable without touching the rest of the system. This architecture lets Netflix push hundreds of code changes per day without service interruptions.
- Uber processes over 15 million trips daily through a microservices system that independently scales its mapping, pricing, and driver-matching services based on demand in each city.
- PayPal reduced its application development time by 400% after migrating to Node.js-based microservices, with each service team working autonomously on a single business function.
- Spotify independently deploys its playback, recommendations, search, and social features as separate microservices, allowing each team to ship updates without coordination overhead.
“Specialization is often the key to improving efficiency. Doing one thing and doing it right is one of the mantras of software development.” - Ajay Ojha, Chief Architect at Radixweb
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Reasons for Building Microservices with Node.js
Node.js is the dominant runtime for microservices in 2026 for three structural reasons: its non-blocking I/O model handles high-concurrency workloads without spinning up new threads, its JavaScript runtime enables full-stack teams to share code and tooling across frontend and backend services, and its NPM ecosystem provides ready-built solutions for almost every microservices use case. Software architects choose Node.js for JSON API services, real-time event-driven systems, streaming applications, and I/O-intensive data pipelines.
Advantages of Microservices in Node.js
Let’s understand some of the major benefits of using Node.js microservices architecture for Node.js backend development services.
- Single-threaded Event Loop
Node.js uses a single-threaded, non-blocking event loop that handles concurrent operations efficiently. Microservices process multiple requests simultaneously without creating new threads. It keeps resource usage low and maintains high responsiveness in distributed systems.
- No Buffering
Node.js streams data in real-time chunks without traditional buffering delays. Microservices deliver responses immediately as data becomes available, perfect for live updates, streaming APIs, and real-time dashboards that require instant data flow to clients. (33 words)
- Asynchronous Operations
All Node.js APIs operate asynchronously and non-blocking. APIs move to the next task without waiting for prior operations. As microservices handle database calls, external API requests, and file operations concurrently, you get maximum throughput in high-traffic distributed environments. (34 words)
- Highly Scalable
Node.js servers easily manage thousands of concurrent connections with minimal resources. Microservices scale horizontally by spinning up additional instances, handling traffic spikes effortlessly while maintaining consistent performance across containerized deployments. (31 words)
- Event-driven Architecture
Node.js's event emitter system notifies services when asynchronous operations complete. Microservices react instantly to database changes, message queue events, or user actions, which enables real-time processing and reactive patterns.
- Lightning Fast Performance
Google's V8 engine compiles JavaScript directly to machine code and executes microservice logic at native speeds. Even complex computations run efficiently, and that makes Node.js suitable for CPU-intensive tasks.
- Liberal Licensing
Node.js uses the permissive MIT license, which allows unrestricted commercial use and modification. Teams building enterprise microservices avoid licensing costs and legal complexities while freely customizing core runtime behavior for specific architectural needs.
Popular Microservices Node.js Frameworks
Here are some of the popular frameworks for building microservices in Node.js:
Express.js: The most popular, flexible Node.js framework that can handle HTTP requests and responses. Express.js is customizable and easy to configure.
Nest.js: Another Node.js microservices framework, which provides numerous built-in features, like routing and caching.
Hapi.js: This framework is simple and scalable with a modular architecture. It helps you develop microservices in Node.js with built-in support for authentication and validation.
LoopBack: It enables you to provide authentication, authorization, and data persistence with its model-driven approach. It is the right Node.js framework for developing microservices and APIs.
Feathers: It’s primarily used to build a real-time app and REST APIs.
“Keeping a low level of coupling allows a software component to be converted into a microservice with little to no effort.” - Vivek Chavda, Sr Technical Lead at Radixweb
Building Microservices with Node JS
If you are planning to build microservices with Node.js, it’s essential to have a basic understanding of the JavaScript programming language. The steps for creating Node.js microservices represent how working apps in our hyperconnected world can perform incredibly well when built with a functional combination of many, unique APIs.
Let's create a microservice for integrating external APIs in Node.js to create a microservice to better comprehend the process. The microservice will get better as the development goes along to make it more responsive and economical.
Step 1: Determine the Business Requirements
Before developing microservices using Node.js, the first and foremost thing you have to do is understand the requirements of your services. Depending on their project needs, you must choose the technologies that help you build microservices.
Here, we are going to demonstrate an example that will calculate the distance between two ZIP codes. The first thing we will do is to identify two ZIP codes and then come up with the distance between them in miles.
With the utilization of validation techniques, we will also configure external API calls and quickly duplicate calls.
We will have to follow a cost-effective approach here and put the internal cache into practice.
Step 2: Initialization
To build microservices, the first thing you have to do is to install Node.js on your system. You can download the latest version – Node.js 20, from its official website.
Here we are going to use NPM (Node Package Manager) to load the dependencies, execute the services, and launch the project.
Follow these steps to initialize the project:
- Open Node.js
- Go to the root folder
- Run the command:
$ npm init
Once we execute the command, it will lead us to the package.json file creation. Also, it will establish the foundation of our project. You can choose from the defaults and update later on.
However, we will be using Express.js – a backend framework for Node.js. And Request – the package that will help you communicate with the external API.
If we talk about Express and Request packages, the Express package allows microservices to set up a connection with third-party, web-based APIs. The Express package acts as a structure for Node applications to support the Node.js foundation of microservices.
Write the below-given commands to add these packages to package.json file:
$ npm install express request- At the end of the command, add:
--save - Execute the command
Once you execute npm init command, you will see a structure of files and folders for creating microservices.
Here, server.js is the primary file. API support files are located in the api folder.
Third-party API connection logic is stored in the service folder.
Other folders created include node_modules, package-lock.json, and package.json. However, the dependencies of Express and Request packages are stored in node_modules.
Now, you can start coding for microservices.
Step 3: Setting Up the Server
The first step in the coding process is creating a server to identify and accept requests. The server.js file, which is the project's main file, must be opened in order to start this process.
The server.js file's source code is as follows:
var express = require('express');
var app = express();
var port =process.env.PORT || 3000;
var routes = require('./api/routes'); routes(app);
app.listen(port,function(){ console.log('Server started on port: ' + port); });
Now the next step is to identify routes for response transmission. The server created earlier assigns routes to ensure all requests are processed.
“As a general rule, a microservice should be small enough to be completely rewritten in a sprint.”
Step 4: Analyzing Routes
The next thing we have to do is analyze the server's routes. We will also assign each one to target in the controller object, which we will create in the next step.
Two endpoints for receiving and sending requests will establish the routes. For this project, we will use the ZIP codes as the two parameters to mark the paths for the distance endpoints.
'use strict';
var controller = require('./controller');
module.exports = function(app) {
app.route('/about')
.get(controller.about);
app.route('/distance/:zipcode1/:zipcode2')
.get(controller.get_distance);
};
The 'use strict' directive is used in the most recent iterations of JavaScript. The purpose of this directive is to create secure coding practices. Module.exports is used to validate internal module functions.
You can use defined functions as they are available in another file via the routes module. The Express package's routes can be specified in the routes module, which can be imported from server.js.
At this stage of the process, the app includes two routes. The first route transmits the GET requests on / about the end point. The about function in the controller handles these requests.
GET requests are sent on the /distance endpoint via the second route that was introduced to the app. The get_distance function in the controller handles these requests.
The two parameters listed here are zipcode1 and zipcode2, respectively.
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Step 5: Create Controller Logic
The controller logic of microservices was implemented to introduce new functions. A controller object was developed based on the user actions and intentions, creating communication with the new or updated data for processing objects.
We are creating a controller object with two properties for our project. These two properties serve as management tools for the routes module's requests.
'use strict';
var properties = required('../package.json');
var distance = require('../service/distance');
var controllers = {
about: function(req,res){
var aboutInfo = { name:properties.name, version: properties.version }
res.json(aboutInfo);
},
get_distance: function(req, res){
distance.find(req, res, function(err,dist){
if(err) res.send(err); res.json(dist);
});
},
};
module.exports = controllers;
Using the mentioned code, we create properties controller objects. To enable process objects to import and utilize the file’s information content, it refers to the package.json file.
Here, about and get_distance are two separate sections of our code. Requests and response objects are delivered to the first functionality. When the about functionality is used, the package.json file returns a brand-new object.
The get_distance functionality is designed to maintain coordination between the find function and the distance module. It receives error and distance objects and, returns the response object if an error is encountered.
Step 6: Establishing the External API Call
Our next task is to design an external API call to handle calls to a third-party API after developing controller logic.
ZipCodeAPI.com offers the distance API that we're going to use without charge.
In our project, we've set an expired test key as the default key for outgoing calls.
Let’s explore the code here:
var request = require('request');
const apiKey = process.env.ZIPCODE_API_KEY || "hkCt1nW1wF1rppaEmoor7T9G4ta7R5wFSu8l1dokNz8y53gGZHDneWWVosbEYirC";
const zipCodeURL = 'https://www.zipcodeapi.com/rest/';
var distance = {
find: function(req, res, next) {
request(zipCodeURL + apiKey
+ '/distance.json/' + req.params.zipcode1 + '/'
+ req.params.zipcode2 + '/mile',
function (error, response, body) {
if (!error && response.statusCode == 200) {
response = JSON.parse(body);
res.send(response);
} else {
console.log(response.statusCode + response.body);
res.send({distance: -1});
}
});
}
};
module.exports = distance;
The above code will execute the Request package for the external HTTP request. This code takes a request, a response, and the next object to find as parameters.
The request object accepts the server’s URL out of these three. Then callback function handles the response.
The status of the response will be HTTP Status code 200 if there are any issues. Then, the body of the response resolves into elements and returns, improving response handling effectiveness.
Step 7: Execution
Bang on! Now your application is ready to execute. There is an export of distant objects. The controller can represent functions and concrete instances of the external API calls as required.
However, you must ensure there are no typos in the code to execute the microservices.
“The general rule in Node.js apps is to never block the thread. If you find yourself blocking the thread, you might need to rethink how to avoid it.”
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Microservices Challenges in Node.js
Stepping into the world of development is not as easy as you think. There are a lot of challenges you need to face while developing microservices with Node.js.
As a renowned Node.js backend development company, we have figured out some of the major challenges every developer faces while developing JavaScript microservices with Node.js.
Process CPU-bound Tasks Poorly
Since Node.js follows a single-threaded, it cannot perform CPU-intensive tasks. Hence, the application encounters performance bottlenecks as the entire CPU bandwidth gets used for processing large requests. Multithreading was added as an experimental feature in the Node.js 10.5.0 upgrade to address this problem.
Poor NPM Tools
Apart from considering core NPM tools, the vast majority of Node.js platform tools are not thoroughly tested or documented. The registries are arranged inappropriately. In addition, the open-source ecosystem is inadequately supervised by Joyent, the creators of Node.js.
Limited Team of Node.js Developers
When there are a vast number of technologies – frameworks, tools, languages, and platforms available in the market, as compared to them, you will find a shallow amount of Node JS developers. The growing demand for NodeJS continues to not be matched due to developers' lack of professional experience.
Avail the Benefits of NodeJS Microservices with RadixwebDespite having challenges and drawbacks, Node.js has, it’s still the most popular runtime environment to build real-time, complex applications and JavaScript microservices. Here, the RESTful APIs help the architecture to process the data and maintain the code while deploying each microservices.In fact, when you develop microservices with Node.js and Express, it eventually enables you to build scalable and maintainable applications that can adapt to evolving business requirements. Therefore, we have seen and will see Node.js actively used in developing microservices for enterprise software development.Hence, it’s the right time to follow the best practices and steps we demonstrated in this guide; and leverage the capabilities of NodeJS to embark on your JavaScript microservices journey.We hope your intention of reading this tutorial or blog has quenched your thirst and justified the purpose. If you plan to avail the benefits of NodeJS microservices, you can hire NodeJS developers from Radixweb with various engagement models. Don’t wait until you lose your spot out of your competitors. Connect with our experts now!
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About the Author
Dhaval Dave is the VP of Operations & Delivery at Radixweb with over 18 years of experience in enterprise software engineering and technology operations. He specializes in cloud-native architecture, SDLC optimization, and large-scale engineering delivery. Dhaval leads teams that build scalable, resilient software systems for Global 2000 organizations, ensuring operational excellence through Agile methodologies, DevOps practices, and data-driven engineering strategies.
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