Evaluating Remote Tech Candidates / Remote Recruitment

How to Hire a Node.js Developer

Costanza Tagliaferri
- 3 min. to read

If you want to build a mobile app for your business, sooner or later you will find yourself wondering how to hire a Node.js developer. Tech leaders such as Uber, eBay, Walmart, and Netflix are using Node.js because it’s the most popular framework between engineers and programmers. 

According to a Stack Overflow survey, 51% of programmers choose Node.Js over other frameworks and tools. That’s because it uses JavaScript, which is the most used programming language.

So, everyone seems to recommend it. The list of benefits can be endless. Its popularity blew up because it allows the automatic increase of multiple projects during the development stage. But what are we actually talking about?

Node.js In Web Development

By definition, Node.js is more than a framework or a library. It’s a runtime environment based on Chrome’s V8 JavaScript engine.

In web development, you can use the Node.js platform to scale inputs from many people across multiple machines and, in some cases, multiple data centers. In short, a web application built with Node.js allows a real-time connection between the user and server with a free exchange of data and input. Because it’s written in JavaScript, it easily connects with diverse databases working smoothly in Microsoft environments and open-source operating systems. 

To sum up, in business solutions you can use Node.js for:

  • Backend for Social Media Networking
  • Single-page Application
  • ChatBot Application
  • Data Streaming
  • IoT Application

But what’s so special about it?

Hire a talented remote programmer

An Overview of Node.js 

In 2009, Ryan Dahl presented this magic open-source software at the annual European JSConf. Used by several tech leaders, when Node.js started a wide adoption of server-side JavaScript in 2017, this technology became the best choice for companies like Google Trends.

During the last 10 years, programmers had to deal with two main problems: concurrency and blocking. For a computer system, concurrency is the ability to handle multiple requests at the same time, including the ones interacting with each other. In computer processes, blocking happens when the computer needs to stop to complete an earlier process.  

Node.js Revolution

Here comes the Node.js revolution, offering one solution for two problems. This software platform allows programmers to create scalable applications running on networks concurrently without blocking. Node.js runs on a server independently of Apache, Nginx, and other server software, using an event-driven architecture where inputs trigger the system’s response. 

With Node.js programmers can use an extensive set of code to develop scalable software applications. And by using JavaScript, Node.js makes it easy to connect to databases, log activities, build plugins and framework, create a web server and perform several tasks. This flexibility reduces software development time. The programming language hides the technical complexity that makes the app run concurrently across networks, and a programmer can create a web server with no more than six lines of code! 

Let’s take a step further and explore the unique technical features of this software application: 

Benefits of using Node.js 

1. Solid Tech Stack

Only during 2018, Node.js had an average of 368,985,988 downloads and over 750 new contributors. 

Using this technology for backend with full-stack JavaScript development, you can experience better efficiency and productivity in terms of programming. Node.js also has great features that enable code sharing and reusability, speed, performance, free tools, and different channels.  

2. Fast-processing And Event-based Model 

One of the major advantages of using Node.js is its speed. Here are the main reasons why this framework is one of the fastest server-side solutions: 

  • V8 Engine: Originally developed for the Chrome browser with C++ language, Chrome’s V8 compiles functions written in JavaScript into machine code at an impressive speed. 
  • Non-blocking Input/Output and asynchronous request handling allow Node.js to process requests without delays. 
  • Its event-based model uses a common language for client and server-side, allowing a faster synchronization in real-time applications. 
3. Scalable Technology for Microservices

Node.js allows breaking the application logic into smaller microservices to enable flexibility and build up the groundwork for further growth. In short, this system will allow you to add microservices to the existing ones rather than to integrate additional features to the core app functionalities.

4. Rich System

As a marketplace for open sources JavaScript tools, Node.js has over 836,000 libraries available and more than 10,000 new releases every week. 

5. Corporate Support

Supported by Joyent, Node.js is one of the most supported open source projects by leading companies such as PayPal, Medium, Trello, Uber, or Zendesk.

6. JSON Support 

JSON, or JavaScript Object Notation, organizes data into key-value pairs making any web applications work like software. Unlike PHP and Ruby, JSON recycles the connection between a web browser and remote servers providing a simple data organization and transmission process. Using this support, Node.js speed up primary data transfer standards organizing a huge amount of data. 

Pitfalls of Using Node.js

1. Performance Bottlenecks With Heavy Computational Tasks

As we said, Node.js can run multiple requests at the same time avoiding blocking. When Node.js answers a client call, it starts the request and processes the task during the callback. Processing multiple tasks asynchronously, Node.js executes the code on an event basis called an event-loop

To clarify, the issue rises when Node.js receives a CPU-bound task – the rate at which CPU speed limits the process development. When a heavy request comes to the event loop, Node.js sets a CPU queueing other tasks and slowing down the event loop. 

2. Callback Issues 

To manage multiple requests at once, Node.js relies on callbacks, the function running after each task when the queue is finished. Subsequently, when queue tasks and their callbacks add up in the background, happens the so-called callback hell. The number of pending tasks impacts the quality of code making it difficult to maintain the code running smoothly.   

3. Tools in Development 

While Node.js grows every day more, many correlated tools are of poor quality or not properly tested yet. Without a structured and documented registry, it can get difficult to find solutions for your project when you are developing new app features. 

As an open-source in constant update, this technology still has some issues and technical steps to improve the development process. However, as a widespread and open-source, you can count on a large community to add information and improve the system.

What Is a Node.Js Developer?

Node.js is a great software with an enormous potential for mobile applications. But you still need a developer to run the code and maintain the functionality of the app. 

If you are looking to hire a Node.js developer, you want someone to manage the server and the users’ data interchange. In short, Node.js programmers’ core focus is developing all server-side logic, definition, and maintenance of the central database. In addition, they ensure high performance and responsiveness to requests from the front-end. Finally, even working mainly in backend development, they are also responsible for integrating the front-end elements into the application. 

Role & Responsibilities 

  • Integrating user-facing elements developed by front-end developers.
  • Writing efficient, reusable, testable code.
  • Designing and implementing high-availability and performance applications.
  • Security and data protection.
  • Integrating data storage solutions such as databases, key-value stores, blob stores, etc. 

Skills And Qualifications

  • JavaScript
  • Asynchronous programming
  • Server-side templating languages
  • Server-side CSS preprocessors
  • Basic understanding of HTML5, CSS3, and front-end technologies.
  • Accessibility and security compliance
  • User authentication and authorization across multiple systems and servers
  • Integration of data sources and databases 
  • Design principles behind a scalable application
  • Multiple delivery platforms and optimizing output to match the specific platform
  • Database schemas to support business processes
  • Automated testing platforms 

How to Hire the Best Node.js Developer

To recap, Node.js is a relatively new and open-source technology and it’s a work in progress. So, the skills you need might vary depending on the role they will fill in your organization.

These are some of the skills you should keep in mind when reviewing their CVs and interviewing them. 

  • 3-4 years of experience 
  • Knowledge of REST APIs
  • Node.js frameworks (Nest.js, Koa.js, Express.js, Feathers.io, etc.)
  • Basic skills in React or Angular front-development systems
  • Databases such as MySQL, CouchDB, PostgreSQL, MongoDB 
  • Problem Solving 

How to make sure that the candidate you are hiring matches these basic requirements? The interview process. As obvious as it sounds, a good interview is still, and perhaps always be, the best way to spot the best candidate for your team. 

Best Interview Questions for Remote NodeJs Developers

 1. What’s the difference between JavaScript and Node.js?
TypeProgramming LanguageInterpreter and environment for JavaScript
UtilityUsed for any client-side activity for a web applicationUsed for accessing or performing any non-blocking operation of any operating system
Running EngineSpider monkey (FireFox), JavaScript Core (Safari), V8 (Google Chrome), etc.V8 (Google Chrome)
 Source: Edureka.co
2. Best benefits of using Node.js?
FastGoogle Chrome’s V8 JavaScript Engine makes Node.Js library very fast in code execution.
AsynchronousNode.js based server never waits for an API to return data making it asynchronous.
ScalableIt is highly scalable because of its event mechanism which helps the server to respond in a non-blocking way.
Open SourceNode.js has an extensive open-source community producing modules to add additional capabilities to Node.js applications.
No BufferingNode.js applications simply output the data in chunks without buffering any data.
 Source: Edureka.co
3. Difference between Angular and Node.js? And why do you need a basic Angular understanding?

As a Node.js developer, I need a basic understanding of Angular because I will be in charge of backend systems that will require the integration of front-end elements. 

1. It is an open source web application development framework1. It is a cross-platform run-time environment for applications
2. It is written in TypeScript2. It is written in C, C++ and JavaScript languages
3. Used for building single-page client-side web applications3. Used for building fast and scalable server-side networking applications
4. Angular itself is a web application framework4. Node.js has many different frameworks like Sails.js, Partial.js, and Express.js, etc.
5. Ideal for creating highly active and interactive web apps5. Ideal for developing small size projects
6. Helpful in splitting an app into MVC components6. Helpful in generating database queries 
7. Suitable for developing real-time applications 7. Suitable in situations where something faster and more scalable is required
 Source: Edureka.co

4. What is REPL in the context of Node.js?

REPL in Node.js stands for Read, Eval, Print, and Loop. It represents a computer environment with a command and output system. Coming in Node.js by default, REPL can perform the below-listed tasks:

  • Read: Reads the user’s input, translates it into JavaScript data-structure, and stores it in the memory.
  • Eval: Receives and evaluates data structures
  • Print: Prints the outcome
  • Loop: Loops commands until CTRL+C is pressed twice.
5. List down the tasks you can do asynchronously using the event loop?

– I/O operations

– Heavy computation

– Anything requiring blocking

6. What is an error-first callback?

In Node.js, an error-first callback passes errors and data. So, an error object is the first parameter you need to pass to these functions. Other parameters represent associated data. You can pass the error object for testing the system, and if you don’t report any issue, you can just go ahead and with the subsequent arguments.

1234567var myPost = new Post({title: ‘edureka’});myPost.save(function(err,myInstance){if(err){//handle error and return}//go ahead with `myInstance`});
 Source: Edureka.co
7. What is the purpose of module.exports? Please give an example.

A module encapsulates all the related codes into a single unit of code, which can be interpreted by shifting all related functions into a single file. 

As example, imagine a file called greet.js containing two functions:

1234567module.exports = {greetInHindi: function(){return “NAMASTE”;},greetInKorean: function(){return “ANNYEONGHASEYO”;}};
 Source: Edureka.co

Module.exports provide two functions which can be imported in another file using this code:

123var eduGreets = require (“./greet.js”);eduGreets.greetInHindi() //NAMASTEeduGreets.greetInKorean() //ANNYEONGHASEYO
 Source: Edureka.co
8. What is callback hell?

Callback Hell, also known as the Pyramid of Doom, is a pattern caused by intensively nested unreadable callbacks. Usually, a callback hell contains multiple nested callback functions, making it hard to read and debug following improper implementation of the asynchronous logic.

 Source: Edureka.co
9. Difference between spawn() and fork() methods in Node.js?

In Node.js, the spawn() is used to launch a new process with a provided set of commands without creating a new V8 instance but copying the node module active on the processor. You can use this method when your child process collects a large amount of data.


1child_process.spawn(command[, args][, options])
 Source: Edureka.co

The fork() is a special instance of spawn() able to execute a new instance of the V8 engine with multiple workers running on a single Node code base for various tasks.


1child_process.fork(modulePath[, args][, options])
 Source: Edureka.co
10. What are global objects in Node.js?

In NodeJs, global objects can be modules, functions, strings, objects, etc. Therefore, they are available in all the modules of the application for immediate use. Some of these objects can be in the module scope instead of the global scope.

Where to Find the Best Node.js Developers? DistantJob can Help You

Now you know what NodeJs is about and who you need to boost your business. After that, what type of employee are you looking for? A freelancer to help you with a project? Or a full-time employee for longer collaborations?

All these options can be great, it just depends on what you are looking for in your project. So, think about the person you would want in your team and get started with your hiring process to find the best NodeJs developer! 

If you don’t have the time and energy to go through the recruiting process, we are here! As a remote recruitment agency with over a decade of experience, we have helped companies successfully hire remote developers. We are always here to share practical advice and with our unique method to find the best fit for your team in 2 weeks – try us out!

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