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Hire JavaScript Developers

Quickly hire JavaScript developers who are friendly and experienced

Our expert JavaScript engineers are excited to start working on your JavaScript project and bringing your vision to life.

Our engineers start sooner

There’s no hassle, no search process, just a shortlist of meticulously evaluated candidates. Pick your engineers, and they’ll start right away—often within 1-2 weeks.


Our engineers stay longer

We provide ongoing professional and personal support for our engineers. So, they have high job satisfaction, and they’re more likely to stay on a project long-term.


Our engineers feel secure

We take care of talent acquisition, and we take care of our developers. We also take the pressure off HR by managing payroll, benefits, and compliance.


6 reasons to hire Trio developers


with built-in HR support for hassle-free hiring.

Dynamic skill

towards seamless collaboration.


that works in U.S time zones.

Vetted skills &

so you always get quality results.


of experiencing technical debt and turnover.


to manage team health over the long term.


Companies trust Trio’s expert developers

We exist to give people and businesses possibilities through technology.

Watch our testimonials to explore the possibilities.


Learn how Uberdoc leveraged Trio engineers to prioritize development.

Brianna Socci
Co-Founder & CPO


Find out how Everyday Speech augmented their teams to better meet deadlines using Trio.

Cal Brunell


Cosmos found it easier to have quality talent allocated to them through Trio.

Mark Kimmerman


Visual Boston worked with Trio to build their team and provide greater value to their customers.

Alex Harrison


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What Is JavaScript?

Javascript is considered to be the most popular programming language in the world in terms of its overall usage in development. 

As the backbone of almost every web page, you can credit most of your late night browser history to the JavaScript language. 

With JavaScript, web users can scroll, click, and eyeball dancing graphics to their hearts’ delight. This is because JavaScript provides interactivity to what would otherwise be a static web page. 

Sure enough, with this kind of potential, JavaScript will keep its top position for many years to come. 

In hindsight, this means many a developer will flock to learn the language and offer their skills to companies in need. 

But finding the right JavaScript developer is a meticulous process that deserves your undivided attention.

What Does a JavaScript Developer Do?

For the most part, JavaScript developers working on the front-end of software development, building interactive user interfaces for websites and web apps. 
That said, JavaScript does provide avenues for full-stack development. Node.js, for one, is a runtime environment that can be used for both back-end and front-end development. 

JavaScript developers tend to be familiar with numerous technologies and frameworks that help otimize the language, like the React library or Vue.js framework. 

Why Use JavaScript in 2022?

Simply put, because you have to. While nobody’s holding a gun to your head, JavaScript is the primier, standalone scripting language for client-side web development.

In other words, if you want to build a website or web app and you want people to see  it, you’re going to need a hefty sprinkling of JavaScript. 

But besides being the foredriver of dynamic user interfaces, it’s worth noting that JavaScript has value on the back-end too. 

JavaScript is incredibly portable, meaning it can be used on almost any platform. Desktop and mobile apps are no stranger to the language. 

And as a high-level programming language, JavaScript is fairly capable as well. JavaScript is well-equipped to handle large amounts of data process server information without sacrificing performance. 

Some of the biggest companies in the world are using JavaScript to power their software, including: 

  • Google
  • Facebook
  • Netflix
  • Paypal
  • LinkedIn

Pros and Cons of JavaScript?

Here’s a breakdown of where JavaScript shines and where it’s not so bright.

Pros of JavaScript:

  • Speed → As an interpreted language, JavaScript directly executes code before compiling it, meaning faster execution overall and less frustrated clients. 
  • Simplicity  → JavaScript is easy to read, write, and understand, meaning it’s just as easy to learn. 
  • Interopability → JavaScript works with many languages. You can implement it alongside virtually any other program and/or presiding language.
  • Popularity → Being utilized in nearly 98% of all websites, JavaScript is undoubtedly popularity. Popularity of this kind warrants more resources for learning and using JavaScript. 

Cons of JavaScipt:

  • Browser support → Although a server-side script always produces the same output, in JavaScript the output will be determined by the browser. The differences are usually minimal but different browsers interpret the language differently.
  • Client-side security → JavaScript code executes on the client-side and web visitators can view the code easily enough, making it susceptible to malicious cyber attacks.

What Is JavaScript Used For?

JavaScript is used for building websites and web-based applications. 

Have a look at what JavaScript developers make possible:

  • adding interactive behavior like zooming in and out or playing audio/video to web pages
  • creating web and mobile apps, the most popular examples consist of the likes of Netflix and Uber
  • building web servers and server-side applications using Node.js
  • creating games that operate inside the browser

Related reading: What Is JavaScript Used For?

How to Hire the Right JavaScript Developer

Hiring the right JavaScript developer is a careful undertaking that involves searching for and vetting qualified candidates. 

What Skills Do JavaScript Developers Need?

When hiring a JavaScript developer, first and foremost, you need to know what to look for. 

For instance, JavaScript developers shouldn’t be limited to merely the JavaScript language. 

They need to be familiar withthe various tools that work with JavaScript to create fully comprehensive and functional websites.

CSS and HTML are great examples of technologies that are not part of the JavaScript  language but often work with JavaScript when it comes to web page layouts, text structures, and the overarching design of a web page. 

Likewise, there are a number of skills JavaScript developers should have mastered. 

At a high level, JavaScript developers should be able to:

  • Work with HTML and CSS
  • Demonstrate high-level proficiency of ES6 and keep up with the latest updates
  • Employ Node.js and NPM for third-party integrations
  • Set up a database and interact with its APIs
  • Utilize test-driven development 
  • Build applications using the MVC design pattern
  • Make use of powerful JavaScript libraries and frameworks such as Angular and React
  • Learn new technologies and read their documentation to build out new functionality and features
  • Write clean and maintainable code

Related reading: How to Hire JavaScript Developers in 2022

JavaScript Developer Job Description Template

Your job description for hiring JavaScript developers should be tailored to invite and welcome candidates to your business. 

You will need to be descriptive, yet concise, and tell the reader exactly what they need. 

The job description should consist of four main sections:

  1. Company Background: Explain what your business does and the mission or purpose behind your work. 
  2. About the Job: Briefly describe what the job is and what service you’re looking for. 
  3. Roles & Responsibilites: Use a bullet point list to outline the day-to-day duties the candidate should expect to fulfill if hired. 
  4. Qualifications & Skills: List the must-have qualifications and skills that you want to have in an optimal candidate. 

Top 10 JavaScript Developer Interview Questions

Once you’ve made it to the interview stage, you want to make sure you ask the right questions. Something like this might do the trick:

  1. Name two principle programming paradigms for JavaScript development. 
  2. Describe the difference between one-way data flow and two-way data binding. 
  3. What are the pros and cons of monolithic versus microservice architecture?
  4. What is a closure in JavaScript? Provide an example. 
  5. Name and identify the basic data types of JavaScript.
  6. Explain the call() method. 
  7. What’s is the use of the NaN() function?
  8. What will “console.log(1 < 2 < 3); console.log(3 > 2 > 1);” return?
  9. What does the ‘this’ keyword do?
  10. Describe the various ways to create an array object in JavaScript. There are three different ways to create an array in JavaScript.

Related reading: Top 11 JavaScript Developer Interview Questions for 2022

How Much Does It Cost to Hire JavaScript Developers in 2022?

The cost of hiring a JavaScript developer is influenced by their experience level and the region in which they are located. 

With outsourcing becoming more and more popular, you have access to global talent all around the world!

How much do JavaScript developers cost in the U.S?

The average salary for a Senior JavaScript developer is $120,046 per year in the United States (according to data as of March 2020). 

Here’s a chart to visualize the salary ranges within the United States for a Senior JavaScript Developer.

How much do Javascript Developers cost in South America? 

Due to economic differences between the United States and South America as a whole, the cost of offshoring software development is significantly lower than hiring full-time with U.S talent. For JavaScript developers in South America, the average salary is currently around $100,000 whereas a mid-level developer costs around $76,000. 

How much do Javascript Developers cost in Ukraine / Eastern Europe?

Eastern Europe shares very similar rates to South America, again due to economic differences. When looking at salaries in Eastern Europe, data shows that a Senior JavaScript Developer costs around $100,000 on average. 

Why Hire a JavaScript Developer with Trio?

Trio JavaScript developers are pre-vetted, interviewed, and then trained further to become true software professionals, capable of adapting to situations that are both within and outside of the scope of their general expertise. 

At Trio, we hold our developers to a higher standard. Much like how elite special forces units recruit only the best from the main branches of the military, we recruit developers who either show amazing potential or demonstrate exceptional skill. We then take their talents and sharpen them even further.

Another benefit of hiring a Trio developer is that you won’t incur the costs of hiring, which can add up to be around 30% of a developer’s salary on average, as well as overhead costs associated with full-time employment. 

By working with Trio, you can enjoy a highly experienced full-time developer for a fraction of the cost, along with the added project management assistance. 

Interested? Tell us about your project so we can get started!

Frequently Asked Questions

How do I hire a JavaScript developer?

If you are looking to hire a JavaScript developer, you can use sites LinkedIn and LinkedIn Jobs to create a job posting. In addition, you can create job listings on sites like Indeed and WeWorkRemotely if you are looking to manage the hiring process yourself.

What does a JavaScript developer do?

A JavaScript developer builds websites and web applications using the JavaScript languages and other JavaScript technologies.

What should I look for in a JavaScript developer?

On a high level, JavaScript developers should be able to: Work with HTML and CSS High-level proficiency of ES6 and stay up to date Proficiency with a library such as React Proficiency with an application framework such as Angular Understanding of Node.js and NPM for third-party integrations Can set up a database and interact with its APIs Is competent and unafraid of testing driven development Has knowledge of the MVC design pattern Is capable of writing clean code.

How much do JavaScript developers make?

The average JavaScript Developer salary in the USA is $107,759 per year or $52 per hour. Entry level positions start anywhere between $76,000 - $82,000 per year while most experienced workers make up to $132,000 per year.

How much does JavaScript cost?

The cost of hiring a JavaScript developer depends on the knowledge and experience that they have acquired working as a developer and using JavaScript specifically. Junior developers: $33-47/hour, Software developers: $48-74/hour, Senior developers: $57-82/hour.

Trio developers

Experts who are easy to work with

Trio developers are talented professionals who quickly become valuable contributors on any team.

Dhyego Trio

"It's exciting to feel supported by Trio and do what I love while experiencing new challenges."

Dhyego C.

Software Engineering Lead
Sheyla Trio

"At Trio we can feel part of a place where each of us is appreciated for who we really are."

Sheyla F.

Senior Software Engineer
Lucas Trio

"It's amazing to work with such talented people who respect me, set an example, and help me grow."

Lucas B.

Software Engineer


Our hardworking engineers have strong technical skills and years of software development experience.



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Our developers thrive on change and challenge. They stay on the bleeding edge of technological development.


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