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Cracking your next NodeJS interview for senior software engineers
NodeJS interview

Most businesses must develop modern software applications in order to adopt and benefit from new technologies. Fortunately, backend developers have an abundance of options. NodeJS is a modern application framework that has simplified large-scale application development.

Many businesses now use this backend technology as part of their tech stack. Popular examples include Netflix, Uber, Twitter, and PayPal. NodeJS is the sixth most popular technology for backend development, according to StackOverflow’s 2021 Developer Survey. According to a NodeJS user survey report, backend developers prefer this technology because it increases developer productivity by 68%, application performance by 48%, and customer satisfaction by 13%.

In this section, we go over the NodeJS developer career landscape in depth.

Career Path in NodeJS

Junior NodeJS developers work on applications such as websites, native apps, and enterprise solutions. After working as a senior developer for 5-6 years, they are promoted to roles such as team lead, architect, scrum master, and product owners. NodeJS programmers can work as app developers, game developers, or product developers.

Senior NodeJS developer roles favor developers with extensive knowledge of agile processes and ceremonies such as backlog grooming, scrums, retrospectives, and demos. Furthermore, GitHub’s technical expertise is required.

Job opportunities and average pay scale NodeJS developers

There are over 55,000 job listings on LinkedIn for NodeJS developers. Indeed currently has nearly 8000 job openings for the same profile.

According to TopCV, the salary of a NodeJS Developer in Vietnam is determined by the position held, the size of the company, and the developer’s experience. However, statistics show that the average salary for this position is around 17,000,000 VND/month, with popular salary ranges ranging from 11,000,000 to 27,000,000 VND/month. This is the average salary for a software developer with 1 to 4 years of experience.

What abilities will be assessed during NodeJS interviews?

Companies that hire NodeJS developers look for specific skill sets. Along with practical knowledge of NodeJS, demonstrated skills in bug fixing and patch development distinguish a candidate.

As a capable NodeJS developer, you should be familiar with front-end technologies. NodeJS developers are frequently required to integrate various backend functionalities with front-end elements. During an interview, their HTML5, CSS3, and core JavaScript concepts are assessed.

There are several NodeJS frameworks, the most basic of which is Express. In addition to Express, most interviews assess developers’ knowledge of other NodeJS frameworks such as Koa.js, Total, and Hapi. Because these frameworks have expanded functionalities, you must become acquainted with them in order to demonstrate your experience.

Model-View-Controller (MVC) frameworks used in NodeJSdevelopment are required. MVC frameworks such as Sinatra, Rails, and StrongLoop are popular.

Another duty of NodeJS developers is to deal with interfaces between different systems. You can highlight your experience with RESTful APIs here.

NodeJS interview Questions and Answers

Is NodeJS compatible with multi-processor platforms?

NodeJS is a single-threaded language that runs on a single processor core by default, not taking full advantage of multi-core processors. NodeJS, on the other hand, allows for the creation of multi-core systems that take full advantage of the available hardware.

The Cluster module in NodeJS allows multiple NodeJS worker processes to run from the same port.

How does NodeJS handle child threads?

NodeJS runs in a single thread and does not expose child threads to the developer. There is no way for a programmer to manage threads in NodeJS because everything happens behind the scenes.

Technically, NodeJS does create child threads for specific tasks such as asynchronous I/O, but these child threads cannot execute any application JavaScript code.

Why is NodeJS preferred over other backend technologies like Java and PHP?

Some of the reasons why NodeJS is preferred include:

  • NodeJS is very fast
  • Node Package Manager has over 50,000 bundles available at the developer’s disposal
  • Perfect for data-intensive, real-time web applications, as NodeJS never waits for an API to return data
  • Better synchronization of code between server and client due to same code base
  • Easy for web developers to start using NodeJS in their projects as it is a JavaScript library

NodeJS interview: Conclusion 

A career as a NodeJS developer is a long-term commitment. NodeJS will remain a dominant JavaScript framework as some of the largest companies use it and offer productivity benefits.

If you want to work remotely for a Singapore tech company while living in Vietnam, Inspius can help. Explore the latest NodeJS jobs here!