How to Hire JavaScript Developers in 2019: A Full Guide

22 Feb 2019
14 min
author avatar
Katherine O.

Creating a website or web application almost always requires using JavaScript language. That’s why the majority of websites, mobile applications, and desktop widgets all people use on a daily basis are based on this language.

Hiring a well-qualified and talented JavaScript developer can be a problem. Experienced developers are quite difficult to find because the demand on web development services is high. Due to this fact, we’ve decided to create a full guide that can help you hire a JavaScript programmer.

In this article, you’ll find JavaScript developer interview questions, roles, skills, etc.

JavaScript Developer Roles and Responsibilities

JavaScript is a great language that can be used for creating full-featured web applications. There are different JavaScript developers for various tasks and they are divided according to their roles and responsibilities. So, let’s discuss JavaScript developers roles more precisely.

JavaScript Developers Roles

Front-end developers

Front-end or client-side development is the process of converting information into the graphical interface to let users interact with the product easily. It can be done by using HTML, CSS, and JavaScript. Speaking about front-end JS development, it’s necessary to consider the challenge. One more problem to tackle is the majority of different devices with various screens. As a result, developers need to consider different browsers, operating systems, and devices.


Want to know more about front-end developers hire? Read our article How to hire front-end developers in 2019.

Back-end developers

Let’s imagine that you already have a front-end developer, so now it’s important to find a person who is able to create a server-side part of the project. Back-end development often consists of three main parts: a server, an application, and a database. As a result, this kind of specialist needs to have some knowledge and experience in Node.js. Moreover, experience with different databases such as SQL or MongoDB is also important.

Full-stack developers

This kind of developers is the most versatile. Full-stack developers skills are perfect for developing prototypes. However, full-stack developers are often not the best option for creating database architecture or developing some specific design requirements. They usually have more experience either in front-end or back-end development.

JavaScript Developer Responsibilities

It’s obvious that JavaScript developers responsibilities vary according to the roles they perform. It’s high time to discuss what kind of responsibilities each kind of JS developer can have.

Front-end JS Developer:

  • Creating a user-facing part of an application
  • Ensuring high performance on mobiles and desktops
  • Writing tested, idiomatic, and documented JavaScript, HTML, and CSS code
  • Cooperating with the back-end developer in the process of building the RESTful API
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Back-end JS Developer:

  • Integrating user-facing parts with server logic
  • Working as part of a team developing applications and services
  • Coding, testing and operating Node.js based services
  • Gathering technical requirements

Full-stack JS developer:

  • Developing both front-end and back-end
  • Working with JavaScript in order to implement server-side logic
  • Designing architectures
  • Creating databases
JavaScript Developer Roles and Responsibilities

JavaScript Developer Roles and Responsibilities

JavaScript Developers Skills

According to the roles we have discussed above, a good JavaScript developer must have certain technical knowledge and skills. Let’s figure them out.

Front-End JavaScript Developer Skills

Front-end engineers create websites utilizing such technologies as HTML5 and CSS3. They are used in order to create dynamic user interactions. In addition to those two, front-end developers should know such frameworks as AngularJS, ReactJS, VueJS or others. Furthermore, in order to make the workflow smoother, engineers need to know Web pack.

Front-end JavaScript Developer Skills

Front-end JavaScript Developer Skills

Back-End JavaScript Developer Skills

The main back-end platform based on JavaScript language is Node.js. It’s extremely powerful in combination with Express.js, Koa.js and other frameworks. In order to create, integrate and manage databases JS developers should have experience with SQL or MongoDB. GraphQL or REST are important for building an API, so your engineer should have experience at least with one of these technologies.

Back-end JavaScript Engineer Skills

Back-end JavaScript Engineer Skills


Have no technical knowledge? Reach us via the contact page or live chat in the right bottom corner to ask for help.

Full-Stack JavaScript Developer Skills

As you know, these developers are able to work with front-end and back-end. As a result, they need to have experience and knowledge of all web development services that were mentioned above. That’s why full-stack developers have been working with JavaScript for some time and are able to perform all JavaScript roles.

Interview Questions for Recruiting JavaScript Developers

During the interview, it’s important to test the knowledge of a candidate. There are two PDF files with questions for you to check JavaScript skills of candidates and their social abilities.

Furthermore, there is a JavaScript developer skill set that every specialist should have. Let’s discuss them more precisely.

  • Problem solving. Every developer faces problems, so it’s important to look at them objectively and find a solution.
  • Creativity. Sometimes it’s necessary to view things from a different angle and come up with less obvious solution.
  • Work in a team. Usually, JavaScript developers work on one project with others as a team, so this kind of experience is important.
  • Follow trends. The world is changing and an ability to keep up with the newest coding languages, applications, devices, etc. allows creating more competitive products.

Question to Check Candidate’s Hard Skills

Hard skills are vital for a job. They include the expertise important for a candidate to work successfully. So, they have to be job specific and are typically listed in job descriptions. Hard skills are usually gained through formal education or training programs, including short-term training classes, online courses, as well as on-the-job training.

We’ve prepared the PDF file where you will find some questions and answers to interview JS developers.

There are some of them:

  • How do you structure your CSS and JavaScript to make it easier for other developers to work with it?
  • What is function hoisting? Let’s discuss the two ways of creating a function.
  • What are the differences between one-way data flow and two-way data binding?
  • Explain the difference between Relational DB vs. NoSQL.
Hard Skills JS Engineer Interview Questions

JavaScript Developer Interview Questions (Hard Skills)

Questions to Check Candidate’s Soft Skills

Good soft skills are also important because they allow candidates to be effective in the workplace. There are so-called ‘interpersonal’ skills. For example, in the PDF below, you will find questions to check such skills as:

  • Conflict management
  • Creativity
  • Decision making
  • Teamwork
  • Response to specific actions
Soft Skills JS Engineer Interview Questions

JavaScript Developer Interview Questions (Soft Skills)

Where to Find JavaScript Developers?

The modern IT market provides a lot of opportunities to find and hire a perfect JavaScript developer who will be able to fulfill all requirements and objectives of your project. There are several popular options: hire a freelance JavaScript developer, create your own in-house team, or look for an outsourcing web development company. Of course, each of these options has advantages and disadvantages that are important to consider beforehand.

Freelance Developer

JavaScript developers that work for themselves are usually called freelancers. There are special websites that provide an opportunity to hire such developers. A freelancer is a good option if you are quite qualified and can interview specialists yourself to find out the level of their knowledge. On the other hand, you may face a lot of bugs in your final product and just waste money.


These developers are usually the cheapest option. Moreover, they are quite good for doing some specific small tasks.


The first thing to consider is your inability to check the code if you are not a qualified developer. As a result, this may lead to bugs in the future. One more drawback is the tendency among freelance developers to fail deadlines. It’s often the case that freelancers live in other countries, so you have different time zones and it becomes difficult to communicate as well as manage the development process. Furthermore, you are not fully protected. It means that your project can be put into a risk if the developer disappears.

There are several platforms where you are able to hire a freelance JavaScript developer. The most popular of them are:

In-House Team of Developers

Making a decision, it’s important to consider in-house development. It means that your JavaScript developers work in your own office and you are able to control the process.


Speaking about long-term cooperation, you may be sure that your employees try to do their best to achieve your company’s goals. In comparison to freelancers who cannot be fully involved in your business, your in-house developers are always motivated to do their best. Moreover, an in-house team of developers can make changes or fix the product faster.


The main problem of employing in-house developers is that the hiring process is often time-consuming. You need to find developers, interview them, and even then there is a chance that they cannot join your team right away. In addition, you need to bear in mind that an experienced and qualified specialist requires a lot of money. It will be necessary to pay the salary even if you haven’t had tasks for them for the whole month. Furthermore, there are always some side costs such as benefits, packages, payment for office rent, taxes, purchase of hardware and software licenses, etc.

There are some services that can help you to hire a developer for your own team:

Outsource Software Developers

Hiring a dedicated software development team becomes more and more popular nowadays. Outsourcing companies provide you with a high-quality product and well-reasonable price. It happens because you are able to choose a reliable vendor from different regions. For example, Ukraine and Asia provide attractive prices as well as good development. How does outsourcing work? You are able to hire JavaScript developers from another country. These programmers work for software outsourcing companies and may become a part of your team. The main task is to find a vendor that you can rely on.


The biggest advantage is that a software outsourcing company is able to give you an experienced and well-qualified JavaScript developer in a short period of time. As a result, you are able to start developing much faster. Moreover, outsourcing allows you to change the size of your team depending on your project requirements. One more benefit is the ability to choose the country where JavaScript developer rates are lower but their hard skills are high.


Locating in different countries, you may face the time zone problem, so you can find it’s difficult to control the development process. One more possible drawback is the language barrier. On the other hand, there are a lot of ways to solve all these issues. Nowadays it’s easy to communicate via emails, messages, calls, etc. Moreover, Project Managers usually have fluent English as well as developers. They are able to follow your schedule and communicate when it’s comfortable for you.

There are a lot of websites that provide rates of the outsourcing companies. The most reliable services are


Freelancers and software development firms are so different that you still couldn’t decide where to hire JavaScript developers? Read our article to compare them.

In order to sum up this part, we can say that the most reliable ways to develop software are hiring an outsourcing company or creating an in-house team. As for freelance developers, it’s better to cooperate with them only if you have technical knowledge.

JavaScript Developer Rates

Speaking about JavaScript developers rates, it’s better to consider them by hiring options (e.g. freelancers, in-house developers, dedicated developers). Moreover, it’s important to contemplate that developers’ rates can vary according to the country of residence.

Freelance JavaScript Developers Hourly Rate

According to Codementor, freelancers tend to count working hours that’s why we provide you with this list.

Freelance JavaScript Developers Hourly Rates
Region Rate per hour ($)

North America


Latin America


Western Europe


Eastern Europe


Middle East


Asia & Pacific


Australia & New Zealand




As you can see, the median hourly rate is from $61 to $80. The most expensive developers live in North America and Australia. So, drawing a line, let’s count how much a freelance JavaScript developer from Europe or Africa will cost you. Taking into consideration that the developer will work eight hours per day, the daily price varies from $488 to $640.

In-House JavaScript Developers Rates

If you have decided to create an in-house team of developers, the first question for you to answer is how much money you need to pay them to stay competitive.

According to the statistics that were taken from Indeed, let’s discuss the average salaries for JavaScript developers in the USA and the UK. So, the average JavaScript programmers rate in the US is approximately $112,000 per year. Junior developers can earn from $41,000 while the most experienced and qualified specialists make up to $215,000 a year.

In England hiring an in-house JavaScript developer is cheaper. Their hourly rate is £28, it leads to £45,000 every year. In the UK junior JavaScript developer salary can start at £25,000 while senior JavaScript developers get up to £70,000 per year.

If you want to find out rates of specialists from other countries, you may use the platform Indeed in order to know developers’ rates.

Outsourced JavaScript Developers Rates

Looking through worldwide JavaScript developers hourly rates, there is an opportunity to notice one tendency. North America and Australia have more expensive engineers while Asia and Eastern Europe are still the cheapest places.


Do you still have questions about price? Read How much does it cost to create a website in 2019?

So, it’s high time to discover the cost of hiring JavaScript developers in outsourcing companies. According to the platform GoodFirms, it’s possible to highlight the rates of outsourcing companies from different countries.

Outsourced JavaScript Developers Hourly Rates
Region Min $/h Max $/h Avg $/h

North America








Western Europe




Latin America




Eastern Europe












How We Use JavaScript at Cleveroad

The JavaScript language is one of the most popular among Cleveroad developers. JS allows engineers to implement custom client-side scripts. Moreover, cross-platform engines like Node.js can be used to write server-side code in JavaScript. This technical language provides a lot of frameworks like AngularJS, ReactJS, etc. Using these frameworks gives an opportunity to reduce the time and efforts required for creating JS based sites and apps. There are some visuals examples of latest projects developed by Cleveroad.

  • Project idea: oMap is a search-and-discovery platform that provides the connection between businesses and customers in Poland.
  • Development team: 3 web developers (1 for back-end development, 2 for front-end), 2 Android developers, 2 iOS developers
  • Project developing time: 4 months
  • Tools used for web development: JavaScript, Angular JS, Node JS, Passport.js, Sequelize.
Ayoo Dance
  • Project idea: Ayoo Dance was made in order to give dancers a place where they can show their skills and communicate.
  • Development team: 2 iOS developers, 2 web developers (back-end & admin panel), UI/UX designer, 1 QA engineer, project manager.
  • Project developing time: 9 months
  • Tools used for web development: NodeJS 8, JavaScript, Express 4, MySQL, Sequelize.

Wrapping Up

To sum up, hiring JavaScript developers requires some technical experience as well as the understanding of JavaScript developers hourly rate, interview questions, and so on.

We are an outsourcing company that has been working with JavaScript development for more than ten years. You are able to check our awards and find out that Cleveroad is one of the top outsourcing development companies in many countries according to

Want to develop your own project?
We can help! Be sure to contact our managers to find out about our team of developers!

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