Thursday, October 17, 2019

5 Questions to Ask a Node.js Developer on an Interview | AIB

Statistics show that there is a large market for Node.js web development, and for companies to find Node.js developers for their business, be they in-house developers or remote employees. The 2018 Node.js User Survey Report, reports that close to 10 million individuals are using Node.js. Users have also reported that better developer productivity and satisfaction, as well as reduced costs, has been among the top business impacts of using Node.js. The survey, as well as other tech reports, show great potential for Node.js web apps as well as the Node.js developers that build them.

According to the 2018 StackOverflow Developer Survey, Node.js is the most commonly used development framework technology all over the world. It is also among the most loved frameworks by developers. Despite its improvements over the years, unlike other software developer tools, Node.js development has been mostly focused on backend and full-stack development projects, most notably for web-applications. A few of the more popular and excellent Node.js examples and sites built using Node.JS are Paypal, Groupon, Wall Street Journal, Geeklist, Band Page, Shutterstock, and Zendesk.

Node.js developers

What to Look for in a Node.js Developer

Node.js is a powerful tool that, in the hands of an expert professional, can accomplish great things. When reviewing technology skills on the resume of node.js developers, there are a number of essential tech skills and knowledge that should be present.

  1. In-depth knowledge and experience in using Node.js, its tools, and related libraries.
  2. Strong understanding and foundation on web development, specifically node.js application development.
  3. Strong knowledge and experience in the use of Node.js IDEs and other web development tools.
  4. Understanding what is a technology stack and its application of Node web development.
  5. Development experience in using web development approaches and tools, such as object-oriented JavaScript, SVG, web libraries, and backend frameworks.
  6. Strong analytical and problem-solving skill sets.

Aside from these tech skills, it is also helpful to understand the role that Node.js developers will be in a web development project, as well as the responsibilities that are entailed. Node.js developers will:

  1. Collaborate with team members in the development of Node.js applications and services.
  2. Contribute to the enhancement of the team and organizational, in the process as well as infrastructure.
  3. Develop responsive and efficient customer-facing UI and backend service tools.
  4. Develop and test Node.js-based backed services and tools.
  5. Proactively and effectively provide solutions to backend issues that have or may come up.

Knowing what is required in a Node.js developer will ease the way for employment. Armed with this knowledge, a Node.js application developer can now start preparing for potential job position opportunities, while a recruiter now has a basic understanding of what to look for in a Node.js developer. Additional preparation will be an improvement at this point, such as having the foreknowledge of what could possibly be asked of Node.js developers.

Questions to Ask When Hiring Node.js Developers

Developer interviews can cover different forms of interviews, such as group interviews and mixed-method interviews. Technical recruiters more often than not focus on task-oriented interviews and leave behavioral interview questions as a follow-up set of second interview questions. There are a lot of resources that can provide the best way to approach interviews – such as what to bring to an interview and choosing and preparing the best interview outfits.

However, for a technical recruiter, the tech skill sets and knowledge have more weight compared to what you wear. Recruiters have various means of scouting for such tech skill sets and knowledge, one of which is through the numerous types of competition held for web developers and software developers. As such, here are 5 of the most common questions that may come up when interviewing Node.js developers. These are just 5 of the most common questions, and there will definitely be even more technical questions that can be asked, but use them as a starting point or as a future reference.

Q#1. What is Node.js used for? How would you use it in a project?
A server-side JavaScript runtime environment, Node.js is the best fit for developing a scalable server-side web-based application. Node.js apps are apps best capable of handling and streamlining large amounts of user-generated transactions and traffic without interrupting other active processes. Node web development is optimized for I/O heavy web applications, network application, distributed systems, and general-purpose web application.

Q#2. Why would you recommend Node.js for a project?
Node.js applications are scalable, provides increased concurrency, and asynchronous processing of I/O transactions. As a tool, Node.js is fast in its code execution, capable of asynchronous processing, is highly scalable, and open-source. This provides companies and developers a cost-effective, efficient, and effective tool to developer highly-responsive web applications.

Q#3. What is event-driven programming?
Event-driven programming is a programming paradigm that focuses on having events as the indicator and catalyst for the program flow. Events may come from various sources, such as other programs, I/O transactions, internal processes, and others.

Q#4. Why is Node.js single-threaded?
This is because Node.js implements asynchronous processing, which required single-thread processing. With this set up better performance and scalability can be achieved.

Q#5. What is a callback hell and how best to avoid them?
Callback hell happens when callbacks are heavily nested. This makes the code not only unreadable, but also a problem to maintain. There are 3 main approaches to preventing and addressing callback hell:

  1. Ensuring that your code is not too heavily nested.
  2. Modularizing your callbacks – segregating callbacks into modular functions that can be called when needed.
  3. In the event of a callback, handling every error at every level.

Because of its continued growth and increasing market demand for Node.js web apps, Node.js web development and Node.js developers definitely have a positive outlook in the coming years. But being a part of this subset of tech talent pipeline is in no way an assurance of a prosperous career. Quality above a great majority of factors is highly regarded in the information technology industry nowadays. Quality is what pushes forward products and companies, and addresses the question concerning technology and its sustainability. Therefore, where tech skills, experience, and demand meet, is the sweet spot when it comes to success in this technology age.

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