Bulletproof node.js project architecture

Introduction

Express.js is great frameworks for making a node.js REST APIs however it doesn’t give you any clue on how to organizing your node.js project.

While it may sound silly, this is a real problem.

The correct organization of your node.js project structure will avoid duplication of code, will improve stability, and potentially, will help you scale your services if is done correctly.

The folder structure 🏢
3 Layer architecture 🥪
Service Layer 💼
Pub/Sub Layer ️️️️🎙️️
Dependency Injection 💉
Unit Testing 🕵🏻
Cron Jobs and recurring task ⚡
Configurations and secrets 🤫
Loaders 🏗️
Example Repository

The folder structure 🏢

Here is the node.js project structure that I’m talking about.

I use this in every node.js REST API service that I build, let’s see in details what every component do.

src │ app.js # App entry point └───api # Express route controllers for all the endpoints of the app └───config # Environment variables and configuration related stuff └───jobs # Jobs definitions for agenda.js └───loaders # Split the startup process into modules └───models # Database models └───services # All the business logic is here └───subscribers # Event handlers for async task └───types # Type declaration files (d.ts) for Typescript

It is more than just a way of ordering javascript files…

3 Layer architecture 🥪

The idea is to use the principle of separation of concerns to move the business logic away from the node.js API Routes.

Because someday, you will want to use your business logic on a CLI tool, or not going far, in a recurring task.

And make an API call from the node.js server to itself it’s not a good idea…

☠️ Don’t put your business logic inside the controllers!! ☠️

You may be tempted to just use the express.js controllers to store the business logic of your application, but this quickly becomes spaghetti code, as soon as you need to write unit tests, you will end up dealing with complex mocks for req or res express.js objects.

It’s complicated to distingue when a response should be sent, and when to continue processing in ‘background’, let’s say after the response is sent to the client.

Here is an example of what not to do.

  route.post(‘/’, async (req, res, next) => {
// This should be a middleware or should be handled by a library like Joi.
const userDTO = req.body;
const isUserValid = validators.user(userDTO)
if(!isUserValid) {
  return res.status(400).end();
}

// Lot of business logic here...
const userRecord = await UserModel.create(userDTO);
delete userRecord.password;
delete userRecord.salt;
const companyRecord = await CompanyModel.create(userRecord);
const companyDashboard = await CompanyDashboard.create(userRecord, companyRecord);

...whatever...

// And here is the 'optimization' that mess up everything.
// The response is sent to client...
res.json({ user: userRecord, company: companyRecord });

// But code execution continues :(
const salaryRecord = await SalaryModel.create(userRecord, companyRecord);
eventTracker.track('user_signup',userRecord,companyRecord,salaryRecord);
intercom.createUser(userRecord);
gaAnalytics.event('user_signup',userRecord);
await EmailService.startSignupSequence(userRecord)

});

Use a service layer for your business logic 💼

This layer is where your business logic should live.

It’s just a collection of classes with clear porpuses, following the SOLID principles applied to node.js.

In this layer there should not exists any form of ‘SQL query’, use the data access layer for that.

Move your code away from the express.js router
Don’t pass the req or res object to the service layer
Don’t return anything related to the HTTP transport layer like a status code or headers from the service layer.

Example

  route.post(‘/’,

validators.userSignup, // this middleware take care of validation

async (req, res, next) => {

// The actual responsability of the route layer.

const userDTO = req.body;
  // Call to service layer.
  // Abstraction on how to access the data layer and the business logic.
  const { user, company } = await UserService.Signup(userDTO);

  // Return a response to client.
  return res.json({ user, company });
});

Here is how your service will be working behind the scenes.

  import UserModel from ‘…/models/user’;

import CompanyModel from ‘…/models/company’;
export default class UserService() {
async Signup(user) {
  const userRecord = await UserModel.create(user);
  const companyRecord = await CompanyModel.create(userRecord); // needs userRecord to have the database id 
  const salaryRecord = await SalaryModel.create(userRecord, companyRecord); // depends on user and company to be created

  ...whatever

  await EmailService.startSignupSequence(userRecord)

  ...do more stuff

  return { user: userRecord, company: companyRecord };
}

}

Visit the example repository

Use a Pub/Sub layer too 🎙️

The pub/sub pattern goes beyond the classic 3 layer architecture proposed here but it’s extremely useful.

The simple node.js API endpoint that creates a user right now, may want to call third-party services, maybe to an analytics service, or maybe start an email sequence.

Sooner than later, that simple “create” operation will be doing several things, and you will end up with 1000 lines of code, all in a single function.

That violates the principle of single responsibility.

So, it’s better to separate responsibilities from the start, so your code remains maintainable.

  import UserModel from ‘…/models/user’;

import CompanyModel from ‘…/models/company’;

import SalaryModel from ‘…/models/salary’;
export default class UserService() {
async Signup(user) {
  const userRecord = await UserModel.create(user);
  const companyRecord = await CompanyModel.create(user);
  const salaryRecord = await SalaryModel.create(user, salary);

  eventTracker.track(
    'user_signup',
    userRecord,
    companyRecord,
    salaryRecord
  );

  intercom.createUser(
    userRecord
  );

  gaAnalytics.event(
    'user_signup',
    userRecord
  );

  await EmailService.startSignupSequence(userRecord)

  ...more stuff

  return { user: userRecord, company: companyRecord };
}

}

An imperative call to a dependent service is not the best way of doing it.

A better approach is by emitting an event i.e. ‘a user signed up with this email’.

And you are done, now it’s the responsibility of the listeners to do their job.

  import UserModel from ‘…/models/user’;

import CompanyModel from ‘…/models/company’;

import SalaryModel from ‘…/models/salary’;
export default class UserService() {
async Signup(user) {
  const userRecord = await this.userModel.create(user);
  const companyRecord = await this.companyModel.create(user);
  this.eventEmitter.emit('user_signup', { user: userRecord, company: companyRecord })
  return userRecord
}

}

Now you can split the event handlers/listeners into multiple files.

  eventEmitter.on(‘user_signup’, ({ user, company }) => {
eventTracker.track(
  'user_signup',
  user,
  company,
);

intercom.createUser(
  user
);

gaAnalytics.event(
  'user_signup',
  user
);

})
eventEmitter.on(‘user_signup’, async ({ user, company }) => {

const salaryRecord = await SalaryModel.create(user, company);

})
eventEmitter.on(‘user_signup’, async ({ user, company }) => {

await EmailService.startSignupSequence(user)

})

You can wrap the await statements into a try-catch block or you can just let it fail and handle the ‘unhandledPromise’ process.on(‘unhandledRejection’,cb)

Dependency Injection 💉

D.I. or inversion of control (IoC) is a common pattern that will help the organization of your code, by ‘injecting’ or passing through the constructor the dependencies of your class or function.

By doing this way you will gain the flexibility to inject a ‘compatible dependency’ when, for example, you write the unit tests for the service, or when the service is used in another context.

Code with no D.I

  import UserModel from ‘…/models/user’;

import CompanyModel from ‘…/models/company’;

import SalaryModel from ‘…/models/salary’;

class UserService {

constructor(){}

Sigup(){

// Caling UserMode, CompanyModel, etc

…

}

}

Code with manual dependency injection

  export default class UserService {

constructor(userModel, companyModel, salaryModel){

this.userModel = userModel;

this.companyModel = companyModel;

this.salaryModel = salaryModel;

}

getMyUser(userId){

// models available throug ‘this’

const user = this.userModel.findById(userId);

return user;

}

}

Now you can inject custom dependencies.

  import UserService from ‘…/services/user’;

import UserModel from ‘…/models/user’;

import CompanyModel from ‘…/models/company’;

const salaryModelMock = {

calculateNetSalary(){

return 42;

}

}

const userServiceInstance = new UserService(userModel, companyModel, salaryModelMock);

const user = await userServiceInstance.getMyUser(‘12346’);

The amount of dependencies a service can have is infinite, and refactor every instantiation of it when you add a new one is a boring and error-prone task.

That’s why dependency injection frameworks were created.

The idea is you declare your dependencies in the class, and when you need an instance of that class, you just call the ‘Service Locator’.

Let’s see an example using typedi an npm library that brings D.I to node.js

WARNING typescript example

  import { Service } from ‘typedi’;

@Service()

export default class UserService {

constructor(

private userModel,

private companyModel,

private salaryModel

){}
getMyUser(userId){
  const user = this.userModel.findById(userId);
  return user;
}

}

services/user.ts

Now typedi will take care of resolving any dependency the UserService require.

  import { Container } from ‘typedi’;

import UserService from ‘…/services/user’;

const userServiceInstance = Container.get(UserService);

const user = await userServiceInstance.getMyUser(‘12346’);

Abusing service locator calls is an anti-pattern

Using Dependency Injection with Express.js in Node.js

Using D.I. in express.js is the final piece of the puzzle for this node.js project architecture.

Routing layer

  route.post(‘/’,

async (req, res, next) => {

const userDTO = req.body;
  const userServiceInstance = Container.get(UserService) // Service locator

  const { user, company } = userServiceInstance.Signup(userDTO);

  return res.json({ user, company });
});

Awesome, project is looking great!

It’s so organized that makes me want to be coding something right now.

Visit the example repository

An unit test example 🕵🏻

By using dependency injection and these organization patterns, unit testing becomes really simple.

You don’t have to mock req/res objects or require(…) calls.

Example: Unit test for signup user method

tests/unit/services/user.js

  import UserService from ‘…/…/…/src/services/user’;
describe(‘User service unit tests’, () => {

describe(‘Signup’, () => {

test(‘Should create user record and emit user_signup event’, async () => {

const eventEmitterService = {

emit: jest.fn(),

};
    const userModel = {
      create: (user) =&gt; {
        return {
          ...user,
          _id: 'mock-user-id'
        }
      },
    };

    const companyModel = {
      create: (user) =&gt; {
        return {
          owner: user._id,
          companyTaxId: '12345',
        }
      },
    };

    const userInput= {
      fullname: 'User Unit Test',
      email: 'test@example.com',
    };

    const userService = new UserService(userModel, companyModel, eventEmitterService);
    const userRecord = await userService.SignUp(teamId.toHexString(), userInput);

    expect(userRecord).toBeDefined();
    expect(userRecord._id).toBeDefined();
    expect(eventEmitterService.emit).toBeCalled();
  });
})

})

Cron Jobs and recurring task ⚡

So, now that the business logic encapsulated into the service layer, it’s easier to use it from a Cron job.

You should never rely on node.js setTimeout or another primitive way of delay the execution of code, but on a framework that persist your jobs, and the execution of them, in a database.

This way you will have control over the failed jobs, and feedback of those who succeed.

I already wrote on good practice for this so, check my guide on using agenda.js the best task manager for node.js.

Configurations and secrets 🤫

Following the battle-tested concepts of Twelve-Factor App for node.js the best approach to store API Keys and database string connections, it’s by using dotenv.

Put a .env file, that must never be committed (but it has to exist with default values in your repository) then, the npm package dotenv loads the .env file and insert the vars into the process.env object of node.js.

That could be enough but, I like to add an extra step.

Have a config/index.ts file where the dotenv npm package and loads the .env file and then I use an object to store the variables, so we have a structure and code autocompletion.

config/index.js

  const dotenv = require(‘dotenv’);

// config() will read your .env file, parse the contents, assign it to process.env.

dotenv.config();
export default {

port: process.env.PORT,

databaseURL: process.env.DATABASE_URI,

paypal: {

publicKey: process.env.PAYPAL_PUBLIC_KEY,

secretKey: process.env.PAYPAL_SECRET_KEY,

},

paypal: {

publicKey: process.env.PAYPAL_PUBLIC_KEY,

secretKey: process.env.PAYPAL_SECRET_KEY,

},

mailchimp: {

apiKey: process.env.MAILCHIMP_API_KEY,

sender: process.env.MAILCHIMP_SENDER,

}

}

This way you avoid flooding your code with process.env.MY_RANDOM_VAR instructions, and by having the autocompletion you don’t have to know how to name the env var.

Visit the example repository

Loaders 🏗️

I took this pattern from W3Tech microframework but without depending upon their package.

The idea is that you split the startup process of your node.js service into testable modules.

Let’s see a classic express.js app initialization

  const mongoose = require(‘mongoose’);

const express = require(‘express’);

const bodyParser = require(‘body-parser’);

const session = require(‘express-session’);

const cors = require(‘cors’);

const errorhandler = require(‘errorhandler’);

const app = express();
app.get(‘/status’, (req, res) => { res.status(200).end(); });

app.head(‘/status’, (req, res) => { res.status(200).end(); });

app.use(cors());

app.use(require(‘morgan’)(‘dev’));

app.use(bodyParser.urlencoded({ extended: false }));

app.use(bodyParser.json(setupForStripeWebhooks));

app.use(require(‘method-override’)());

app.use(express.static(__dirname + ‘/public’));

app.use(session({ secret: process.env.SECRET, cookie: { maxAge: 60000 }, resave: false, saveUninitialized: false }));

mongoose.connect(process.env.DATABASE_URL, { useNewUrlParser: true });
require(‘./config/passport’);

require(‘./models/user’);

require(‘./models/company’);

app.use(require(‘./routes’));

app.use((req, res, next) => {

var err = new Error(‘Not Found’);

err.status = 404;

next(err);

});

app.use((err, req, res) => {

res.status(err.status || 500);

res.json({‘errors’: {

message: err.message,

error: {}

}});

});
… more stuff
… maybe start up Redis
… maybe add more middlewares
async function startServer() {

app.listen(process.env.PORT, err => {

if (err) {

console.log(err);

return;

}

console.log(Your server is ready !);

});

}
// Run the async function to start our server

startServer();

As you see, this part of your application can be a real mess.

Here is an effective way to deal with it.

  const loaders = require(‘./loaders’);

const express = require(‘express’);
async function startServer() {
const app = express();

await loaders.init({ expressApp: app });

app.listen(process.env.PORT, err =&gt; {
  if (err) {
    console.log(err);
    return;
  }
  console.log(`Your server is ready !`);
});

}
startServer();

Now the loaders are just tiny files with a concise purpose

loaders/index.js

  import expressLoader from ‘./express’;

import mongooseLoader from ‘./mongoose’;
export default async ({ expressApp }) => {

const mongoConnection = await mongooseLoader();

console.log(‘MongoDB Intialized’);

await expressLoader({ app: expressApp });

console.log(‘Express Intialized’);
// ... more loaders can be here

// ... Initialize agenda
// ... or Redis, or whatever you want

}

The express loader

loaders/express.js

  import * as express from ‘express’;

import * as bodyParser from ‘body-parser’;

import * as cors from ‘cors’;
export default async ({ app }: { app: express.Application }) => {
app.get('/status', (req, res) =&gt; { res.status(200).end(); });
app.head('/status', (req, res) =&gt; { res.status(200).end(); });
app.enable('trust proxy');

app.use(cors());
app.use(require('morgan')('dev'));
app.use(bodyParser.urlencoded({ extended: false }));

// ...More middlewares

// Return the express app
return app;

})

The mongo loader

loaders/mongoose.js

  import * as mongoose from ‘mongoose’

export default async (): Promise<any> => {

const connection = await mongoose.connect(process.env.DATABASE_URL, { useNewUrlParser: true });

return connection.connection.db;

}

See a complete example of loaders here

Conclusion

We deep dive into a production tested node.js project structure, here are some summarized tips:

Use a 3 layer architecture.
Don’t put your business logic into the express.js controllers.
Use PubSub pattern and emit events for background tasks.
Have dependency injection for your peace of mind.
Never leak your passwords, secrets and API keys, use a configuration manager.
Split your node.js server configurations into small modules that can be loaded independently.

Thanks for reading ❤

If you liked this post, share it with all of your programming buddies!

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Learn More

☞ The Complete Node.js Developer Course (3rd Edition)

☞ Angular & NodeJS - The MEAN Stack Guide

☞ NodeJS - The Complete Guide (incl. MVC, REST APIs, GraphQL)

☞ Node.js: The Complete Guide to Build RESTful APIs (2018)

☞ Learn and Understand NodeJS

☞ MERN Stack Front To Back: Full Stack React, Redux & Node.js

☞ Node, Express, Angular 7, GraphQL and MongoDB CRUD Web App

☞ Node, Express, React.js, Graphql and MongoDB CRUD Web Application

☞ A to Z of Node.js Packages(unconventional)

☞ Top Mistakes That Node.js Developers Make and Should be Avoided

☞ Google’s Go Essentials For Node.js / JavaScript Developers

☞ Angular + WebSocket + Node.js Express = RxJS WebSocketSubject ❤️

Originaly posted on softwareontheroad.com

#node-js #javascript

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Bulletproof node.js project architecture

WebClues Infotech

1616671994

Hire Dedicated Node.js Developers - Hire Node.js Developers

If you look at the backend technology used by today’s most popular apps there is one thing you would find common among them and that is the use of NodeJS Framework. Yes, the NodeJS framework is that effective and successful.

If you wish to have a strong backend for efficient app performance then have NodeJS at the backend.

WebClues Infotech offers different levels of experienced and expert professionals for your app development needs. So hire a dedicated NodeJS developer from WebClues Infotech with your experience requirement and expertise.

So what are you waiting for? Get your app developed with strong performance parameters from WebClues Infotech

For inquiry click here: https://www.webcluesinfotech.com/hire-nodejs-developer/

Book Free Interview: https://bit.ly/3dDShFg

#hire dedicated node.js developers #hire node.js developers #hire top dedicated node.js developers #hire node.js developers in usa & india #hire node js development company #hire the best node.js developers & programmers

Aria Barnes

1622719015

Why use Node.js for Web Development? Benefits and Examples of Apps

Front-end web development has been overwhelmed by JavaScript highlights for quite a long time. Google, Facebook, Wikipedia, and most of all online pages use JS for customer side activities. As of late, it additionally made a shift to cross-platform mobile development as a main technology in React Native, Nativescript, Apache Cordova, and other crossover devices.

Throughout the most recent couple of years, Node.js moved to backend development as well. Designers need to utilize a similar tech stack for the whole web project without learning another language for server-side development. Node.js is a device that adjusts JS usefulness and syntax to the backend.

What is Node.js?

Node.js isn’t a language, or library, or system. It’s a runtime situation: commonly JavaScript needs a program to work, however Node.js makes appropriate settings for JS to run outside of the program. It’s based on a JavaScript V8 motor that can run in Chrome, different programs, or independently.

The extent of V8 is to change JS program situated code into machine code — so JS turns into a broadly useful language and can be perceived by servers. This is one of the advantages of utilizing Node.js in web application development: it expands the usefulness of JavaScript, permitting designers to coordinate the language with APIs, different languages, and outside libraries.

What Are the Advantages of Node.js Web Application Development?

Of late, organizations have been effectively changing from their backend tech stacks to Node.js. LinkedIn picked Node.js over Ruby on Rails since it took care of expanding responsibility better and decreased the quantity of servers by multiple times. PayPal and Netflix did something comparative, just they had a goal to change their design to microservices. We should investigate the motivations to pick Node.JS for web application development and when we are planning to hire node js developers.

Amazing Tech Stack for Web Development

The principal thing that makes Node.js a go-to environment for web development is its JavaScript legacy. It’s the most well known language right now with a great many free devices and a functioning local area. Node.js, because of its association with JS, immediately rose in ubiquity — presently it has in excess of 368 million downloads and a great many free tools in the bundle module.

Alongside prevalence, Node.js additionally acquired the fundamental JS benefits:

quick execution and information preparing;
exceptionally reusable code;
the code is not difficult to learn, compose, read, and keep up;
tremendous asset library, a huge number of free aides, and a functioning local area.

In addition, it’s a piece of a well known MEAN tech stack (the blend of MongoDB, Express.js, Angular, and Node.js — four tools that handle all vital parts of web application development).

Designers Can Utilize JavaScript for the Whole Undertaking

This is perhaps the most clear advantage of Node.js web application development. JavaScript is an unquestionable requirement for web development. Regardless of whether you construct a multi-page or single-page application, you need to know JS well. On the off chance that you are now OK with JavaScript, learning Node.js won’t be an issue. Grammar, fundamental usefulness, primary standards — every one of these things are comparable.

In the event that you have JS designers in your group, it will be simpler for them to learn JS-based Node than a totally new dialect. What’s more, the front-end and back-end codebase will be basically the same, simple to peruse, and keep up — in light of the fact that they are both JS-based.

A Quick Environment for Microservice Development

There’s another motivation behind why Node.js got famous so rapidly. The environment suits well the idea of microservice development (spilling stone monument usefulness into handfuls or many more modest administrations).

Microservices need to speak with one another rapidly — and Node.js is probably the quickest device in information handling. Among the fundamental Node.js benefits for programming development are its non-obstructing algorithms.

Node.js measures a few demands all at once without trusting that the first will be concluded. Many microservices can send messages to one another, and they will be gotten and addressed all the while.

Versatile Web Application Development

Node.js was worked in view of adaptability — its name really says it. The environment permits numerous hubs to run all the while and speak with one another. Here’s the reason Node.js adaptability is better than other web backend development arrangements.

Node.js has a module that is liable for load adjusting for each running CPU center. This is one of numerous Node.js module benefits: you can run various hubs all at once, and the environment will naturally adjust the responsibility.

Node.js permits even apportioning: you can part your application into various situations. You show various forms of the application to different clients, in light of their age, interests, area, language, and so on. This builds personalization and diminishes responsibility. Hub accomplishes this with kid measures — tasks that rapidly speak with one another and share a similar root.

What’s more, Node’s non-hindering solicitation handling framework adds to fast, letting applications measure a great many solicitations.

Control Stream Highlights

Numerous designers consider nonconcurrent to be one of the two impediments and benefits of Node.js web application development. In Node, at whatever point the capacity is executed, the code consequently sends a callback. As the quantity of capacities develops, so does the number of callbacks — and you end up in a circumstance known as the callback damnation.

In any case, Node.js offers an exit plan. You can utilize systems that will plan capacities and sort through callbacks. Systems will associate comparable capacities consequently — so you can track down an essential component via search or in an envelope. At that point, there’s no compelling reason to look through callbacks.

Final Words

So, these are some of the top benefits of Nodejs in web application development. This is how Nodejs is contributing a lot to the field of web application development.

I hope now you are totally aware of the whole process of how Nodejs is really important for your web project. If you are looking to hire a node js development company in India then I would suggest that you take a little consultancy too whenever you call.

Good Luck!

Original Source

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Amelia Williams

1616839211

Node JS Development Company| Node JS Web Developers-SISGAIN

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sophia tondon

1621320738

Angular.JS vs Node.JS || Find the best for your project - Valuecoders

Whether MNCs or Startups, many companies use Angular.JS or Node.JS to develop web applications as these are among the best JavaScript frameworks used for web applications.

According to Statista, Node.JS and Angular.JS are the best frameworks used by developers, with 51.4% and 25.1%, respectively.

Both these frameworks have unique features and advantages, which makes them preferred over the other frameworks.

Many enterprises use these frameworks without even understanding their uniqueness and the type of projects they are suited or made, which is why, today, I will compare some of the best features and advantages of these two frameworks.

So, let’s dive into and learn various things about Angular.JS vs Node.JS without any further delay.

Angular.JS

AngularJS is a fundamental framework for robust web apps. It makes you use HTML as your template language and allows you to spread HTML’s syntax to clearly and succinctly express your application’s components.

AngularJS’s dependency injection & data binding eliminate much of the code you would otherwise have to write. And it all happens within the browser, making it a perfect partner with any server technology.

AngularJS is what HTML would have been having it been designed for applications. HTML is a great declarative language for static documents. It does not contain much in creating applications.

Let’s discuss some main features of Angular.JS and its advantages:

Data Binding

Data binding is probably the most impressive and helpful feature of AngularJS. It will save you from writing a considerable amount of repetitive code.

A typical web application can contain up to 80% of its codebase, dedicated to traversing, manipulating, and listening to the DOM. Data binding makes this code escape so you can concentrate more on your application. Think of your Model as the only source of truth for your application. Your model is where you go to read or update anything in your application.

Data binding directives provide a projection of your Model to the application’s view. This projection is perfect and occurs without any effort on your part.

HTML UI

Another great feature of AngularJS is the fact that it uses the HTML language to build UI. The HTML language is a general and declarative language with concise tags that are easy to understand.

This leads to a more systematic and straightforward UI. JavaScript interfaces are usually more challenging to organize and develop. If you’re looking for a solution that’s fast, easy, and simple to use at a moment’s notice, then this could be it.

Model View Controller (MVC)

MVC is a software design pattern for developing web applications. It is made up of:

Directives allow angular to provide additional functionality with the HTML language. Directives can also be used to “decorate” components with behavior and manipulate DOM attributes in interesting ways. The controller does not need to control the DOM directly, as this must be done through directives.

Directives are a separate part of the set of elements that can be used anywhere other than a web application. The directives provide developers with the element-rich HTML they need to strengthen their online presence.

If you are looking to hire a dedicated angular developer, you can hire an angular js development company.

Node.js is a free and open-source server environment that runs on various platforms(Windows, Linux, Unix, Mac, OS X, etc.). Node.js uses JavaScript on the server.

Node.js is preferred because of its rich library of several JavaScript modules that helps in simplifying web development to a greater extent. Many companies hire Node.js developers for making a NodeJS web application development as it possesses many features.

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Top 10 NodeJs app Development Companies- ValueCoders

Node.js is a prominent tech trend in the space of web and mobile application development. It has been proven very efficient and useful for a variety of application development. Thus, all business owners are eager to leverage this technology for creating their applications.

Are you striving to develop an application using Node.js? But can’t decide which company to hire for NodeJS app development? Well! Don’t stress over it, as the following list of NodeJS app development companies is going to help you find the best partner.

Let’s take a glance at top NodeJS application development companies to hire developers in 2021 for developing a mind-blowing application solution.

Before enlisting companies, I would like to say that every company has a foundation on which they thrive. Their end goals, qualities, and excellence define their competence. Thus, I prepared this list by considering a number of aspects. While making this list, I have considered the following aspects:

Review and rating
Enlisted by software peer & forums
Hourly price
Offered services
Year of experience (Average 8+ years)
Credibility & Excellence
Served clients and more

I believe this list will help you out in choosing the best NodeJS service provider company. So, now let’s explore the top NodeJS developer companies to choose from in 2021.

#1. JSGuru

JSGuru is a top-rated NodeJS app development company with an innovative team of dedicated NodeJS developers engaged in catering best-class UI/UX design, software products, and AWS professional services.

It is a team of one of the most talented developers to hire for all types of innovative solution development, including social media, dating, enterprise, and business-oriented solutions. The company has worked for years with a number of startups and launched a variety of products by collaborating with big-name corporations like T-systems.

If you want to hire NodeJS developers to secure an outstanding application, I would definitely suggest them. They serve in the area of eLearning, FinTech, eCommerce, Telecommunications, Mobile Device Management, and more.

Ratings: 4.9/5.0
Founded: 2006
Headquarters: Banja Luka, Bosnia, and Herzegovina
Price: Starting from $50/hour

Visit Website - https://www.valuecoders.com/blog/technology-and-apps/top-node-js-app-development-companies

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Bulletproof node.js project architecture

Introduction

Table of contents

The folder structure 🏢

3 Layer architecture 🥪

☠️ Don’t put your business logic inside the controllers!! ☠️

Use a service layer for your business logic 💼

Use a Pub/Sub layer too 🎙️

Dependency Injection 💉

Using Dependency Injection with Express.js in Node.js

An unit test example 🕵🏻

Cron Jobs and recurring task ⚡

Configurations and secrets 🤫

Loaders 🏗️

Conclusion

Learn More

What is GEEK

Buddha Community

Hire Dedicated Node.js Developers - Hire Node.js Developers

Why use Node.js for Web Development? Benefits and Examples of Apps

What is Node.js?

What Are the Advantages of Node.js Web Application Development?

Amazing Tech Stack for Web Development

Designers Can Utilize JavaScript for the Whole Undertaking

A Quick Environment for Microservice Development

Versatile Web Application Development

Control Stream Highlights

Final Words

Node JS Development Company| Node JS Web Developers-SISGAIN

Angular.JS vs Node.JS || Find the best for your project - Valuecoders

Top 10 NodeJs app Development Companies- ValueCoders