Hire the Top 3% of Freelance JavaScript Developers

Toptal is a marketplace for top JavaScript developers and coders. CEOs, CTOs, and management at top companies and startups work with Toptal JavaScript freelancers to augment their development teams for JavaScript development, app development, web development, and other software development projects to achieve their business needs.

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Clients Rate Toptal JavaScript Developers4.5 / 5.0on average across 7,516 reviews as of Oct 23, 2023

Hire Freelance JavaScript Developers and Engineers

Jay Johnston

Freelance JavaScript Developer

United StatesToptal Member Since November 26, 2013

Coding HTML, CSS, and JavaScript since his armed forces days in 1997, Jay enjoys bringing value to clients via eCommerce solutions, legacy integrations, and optimized PHP and JavaScript-driven applications. His preferred DevOps environment is AWS, where he has strong skills in (and not limited to): Relational Database Services (RDS), Redshift, Dynamo DB, Data Migration Services (DMS), Lambda (serverless and microservices), Cloudwatch, Cloudtrail, and Event Bridge.

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Tyler Standley

Freelance JavaScript Developer

United StatesToptal Member Since August 3, 2018

Along with strong communication skills and an exemplary work ethic, Tyler brings his hands-on experience with a wide range of programming languages. Recently, though, his focus has been directed towards JavaScript libraries. Throughout his career, he’s worked on multiple agile teams as a core developer and is now interested in working on anything JavaScript-related.

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Justin Michela

Freelance JavaScript Developer

United StatesToptal Member Since June 26, 2018

Justin is a technical professional with a passion for learning and 18+ years of experience leading teams to build enterprise-grade distributed applications that solve real-world problems. Justin firmly believes that collaboration across all facets of a business, from development to marketing to sales, is required to succeed in this endeavor.

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David Mihal

Freelance JavaScript Developer

United StatesToptal Member Since January 8, 2017

David has been developing websites and web applications for all of his adult life. As a software engineer, he's worked for many diverse software companies from early-stage startups to Google. David is experienced with many web frameworks and environments, but he particularly enjoys developing with Meteor.js. He appreciates the importance of quality code as well as the need to meet scheduling demands.

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James Koshigoe

Freelance JavaScript Developer

United StatesToptal Member Since April 2, 2014

James is a software engineer and consultant focused on web development. He has over a decade of experience in both startup and enterprise business environments building solutions where full-stack skills, creative thinking, and high attention to detail are key, and fast turnaround is paramount.

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Ahmad Soliman

Freelance JavaScript Developer

SpainToptal Member Since November 6, 2019

Starting as a Google intern, Ahmad has been leading the development of B2B services and admin web apps since 2015. On projects, he typically makes the architectural decisions about state management, framework selection, testing strategies, folder structure, team load and task allocation, and mentoring junior developers. Ahmad has also built shared UI component libraries, reusable CSS code, higher-order components, and best practices for scalable and maintainable codebases.

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Ricardo Basto

Freelance JavaScript Developer

GermanyToptal Member Since May 7, 2019

Ricardo has been coding for over 20 years, having worked on projects in more than 10 programming languages. He has co-founded companies, worked in a few successful startups as CTO, and managed distributed teams of developers and product designers. Ricardo's recent work has ranged from data science and machine learning to high-performing web and mobile applications, including Web3 and crypto.

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Stepan Anokhin

Freelance JavaScript Developer

RussiaToptal Member Since March 5, 2019

With a solid mathematical knowledge base and a professional software developer background, Stepan has the experience and skills to fulfill most software engineering role. During his professional career, he's worked on various projects including large enterprise systems, web development, and cloud computing. Stepan is always eager to explore new areas in computer science and apply bleeding-edge technologies.

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Anton Razmakhnin

Freelance JavaScript Developer

RussiaToptal Member Since December 19, 2019

Anton is a senior C# developer with over ten years of experience developing both native (WinForms, WPF) and web (ASP.NET) applications for .NET and .NET Core platforms. He has expertise in leading teams, mentoring developers, automating processes, and developing web applications' front-end. He writes exceptionally clean code and is a stickler for testing, ensuring accuracy and stability.

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Davor Badrov

Freelance JavaScript Developer

CroatiaToptal Member Since December 12, 2019

Davor is a senior full-stack developer with 9+ years of experience, skilled in crafting scalable and efficient solutions. Proficient in both monolithic and microservice architectures, Davor is a versatile asset to any team and project with a deep understanding of front-end and back-end technologies. With a passion for problem-solving and constant learning, he is the perfect candidate to drive your company's growth.

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Nicolas Mazza

Freelance JavaScript Developer

ArgentinaToptal Member Since December 11, 2019

Nicolas is a senior UI/UX designer and web developer with over 16 years of experience working in the full cycle of development and deployment. He studied web, desktop, and video game development at Image Campus and architecture and design at the Universidad de Belgrano. As an experienced developer, Nicolas isn’t overly picky about projects; what he values is creating and maintaining a good relationship with the client.

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A Hiring Guide

Guide to Hiring a Great JavaScript Developer

JavaScript developers are needed in many contexts—front-end, back-end, full-stack, and mobile development can all involve JavaScript skills. This guide to hiring JavaScript developers features interview questions and best practices to help you find the perfect fit for your company’s project.

Read Hiring Guide

JavaScript Hiring Resources


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... allows corporations to quickly assemble teams that have the right skills for specific projects.

Despite accelerating demand for coders, Toptal prides itself on almost Ivy League-level vetting.

Our clients
Building a cross-platform app to be used worldwide
Thierry Jakicevic
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Drilling into real-time data creates an industry game changer
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Tripcents wouldn't exist without Toptal. Toptal Projects enabled us to rapidly develop our foundation with a product manager, lead developer, and senior designer. In just over 60 days we went from concept to Alpha. The speed, knowledge, expertise, and flexibility is second to none. The Toptal team were as part of tripcents as any in-house team member of tripcents. They contributed and took ownership of the development just like everyone else. We will continue to use Toptal. As a start up, they are our secret weapon.

Brantley Pace, CEO & Co-Founder


I am more than pleased with our experience with Toptal. The professional I got to work with was on the phone with me within a couple of hours. I knew after discussing my project with him that he was the candidate I wanted. I hired him immediately and he wasted no time in getting to my project, even going the extra mile by adding some great design elements that enhanced our overall look.

Paul Fenley, Director

K Dunn & Associates

The developers I was paired with were incredible -- smart, driven, and responsive. It used to be hard to find quality engineers and consultants. Now it isn't.

Ryan Rockefeller, CEO


Toptal understood our project needs immediately. We were matched with an exceptional freelancer from Argentina who, from Day 1, immersed himself in our industry, blended seamlessly with our team, understood our vision, and produced top-notch results. Toptal makes connecting with superior developers and programmers very easy.

Jason Kulik, Co-Founder


As a small company with limited resources we can't afford to make expensive mistakes. Toptal provided us with an experienced programmer who was able to hit the ground running and begin contributing immediately. It has been a great experience and one we'd repeat again in a heartbeat.

Stuart Pocknee , Principal

Site Specific Software Solutions

We used Toptal to hire a developer with extensive Amazon Web Services experience. We interviewed four candidates, one of which turned out to be a great fit for our requirements. The process was quick and effective.

Abner Guzmán Rivera, CTO and Chief Scientist

Photo Kharma

Sergio was an awesome developer to work with. Top notch, responsive, and got the work done efficiently.

Dennis Baldwin, Chief Technologist and Co-Founder


Working with Marcin is a joy. He is competent, professional, flexible, and extremely quick to understand what is required and how to implement it.

André Fischer, CTO


We needed a expert engineer who could start on our project immediately. Simanas exceeded our expectations with his work. Not having to interview and chase down an expert developer was an excellent time-saver and made everyone feel more comfortable with our choice to switch platforms to utilize a more robust language. Toptal made the process easy and convenient. Toptal is now the first place we look for expert-level help.

Derek Minor, Senior VP of Web Development

Networld Media Group

Toptal's developers and architects have been both very professional and easy to work with. The solution they produced was fairly priced and top quality, reducing our time to launch. Thanks again, Toptal.

Jeremy Wessels, CEO


We had a great experience with Toptal. They paired us with the perfect developer for our application and made the process very easy. It was also easy to extend beyond the initial time frame, and we were able to keep the same contractor throughout our project. We definitely recommend Toptal for finding high quality talent quickly and seamlessly.

Ryan Morrissey, CTO

Applied Business Technologies, LLC

I'm incredibly impressed with Toptal. Our developer communicates with me every day, and is a very powerful coder. He's a true professional and his work is just excellent. 5 stars for Toptal.

Pietro Casoar, CEO

Ronin Play Pty Ltd

Working with Toptal has been a great experience. Prior to using them, I had spent quite some time interviewing other freelancers and wasn't finding what I needed. After engaging with Toptal, they matched me up with the perfect developer in a matter of days. The developer I'm working with not only delivers quality code, but he also makes suggestions on things that I hadn't thought of. It's clear to me that Amaury knows what he is doing. Highly recommended!

George Cheng, CEO

Bulavard, Inc.

As a Toptal qualified front-end developer, I also run my own consulting practice. When clients come to me for help filling key roles on their team, Toptal is the only place I feel comfortable recommending. Toptal's entire candidate pool is the best of the best. Toptal is the best value for money I've found in nearly half a decade of professional online work.

Ethan Brooks, CTO

Langlotz Patent & Trademark Works, Inc.

In Higgle's early days, we needed the best-in-class developers, at affordable rates, in a timely fashion. Toptal delivered!

Lara Aldag, CEO


Toptal makes finding a candidate extremely easy and gives you peace-of-mind that they have the skills to deliver. I would definitely recommend their services to anyone looking for highly-skilled developers.

Michael Gluckman, Data Manager


Toptal’s ability to rapidly match our project with the best developers was just superb. The developers have become part of our team, and I’m amazed at the level of professional commitment each of them has demonstrated. For those looking to work remotely with the best engineers, look no further than Toptal.

Laurent Alis, Founder


Toptal makes finding qualified engineers a breeze. We needed an experienced ASP.NET MVC architect to guide the development of our start-up app, and Toptal had three great candidates for us in less than a week. After making our selection, the engineer was online immediately and hit the ground running. It was so much faster and easier than having to discover and vet candidates ourselves.

Jeff Kelly, Co-Founder

Concerted Solutions

We needed some short-term work in Scala, and Toptal found us a great developer within 24 hours. This simply would not have been possible via any other platform.

Franco Arda, Co-Founder

Toptal offers a no-compromise solution to businesses undergoing rapid development and scale. Every engineer we've contracted through Toptal has quickly integrated into our team and held their work to the highest standard of quality while maintaining blazing development speed.

Greg Kimball, Co-Founder

How to Hire JavaScript Developers through Toptal


Talk to One of Our Industry Experts

A Toptal director of engineering will work with you to understand your goals, technical needs, and team dynamics.

Work With Hand-Selected Talent

Within days, we'll introduce you to the right JavaScript developer for your project. Average time to match is under 24 hours.

The Right Fit, Guaranteed

Work with your new JavaScript developer for a trial period (pay only if satisfied), ensuring they're the right fit before starting the engagement.

Find Experts With Related Skills

Access a vast pool of skilled developers in our talent network and hire the top 3% within just 48 hours.


  • How much does it cost to hire a JavaScript engineer?

    The cost of hiring a JavaScript engineer can vary significantly depending on a wide range of factors, like experience level, region, freelance versus full time, and industry. Glassdoor reports that the typical annual salary for a US-based JavaScript developer ranges from $80,000 and $143,000 as of July 17, 2023.

    Enterprise resource planning (ERP) systems, customer relationship management (CRM) software, and data analytics platforms generally require higher-paid JavaScript developers. Marketing automation tools and business intelligence projects have a similar salary range to JS developers on the whole. E-commerce platforms and content management systems (CMS) may warrant salaries toward the lower end of the range in some cases, but the range for these projects is broad nonetheless.

  • How do I hire JavaScript developers?

    First, define your project requirements: Clearly outline the technical skills, experience, and expertise needed for your project. Consider the frameworks, libraries, or tools the developer should (or must) know how to use, and determine whether you need a junior, mid-level, or senior developer.

    Next, use the requirements to create a compelling job description that also communicates your company culture, benefits, and project goals. Then, post the job opening on reputable job boards, social media platforms, and developer communities, particularly those focused on JavaScript.

    Finally, leverage your network: Reach out to your professional contacts, attend industry events or meetups, and consider referrals from colleagues or friends to find potential candidates.

  • Are JavaScript developers in demand?

    Yes. JavaScript is the de facto front-end standard and also widely used for back-end systems, so JavaScript developers are always in demand. Full-stack developers are especially sought-after, as their arsenal of skills enable them to independently create and manage a website. But they’re not just cost-effective for small and medium-sized businesses. In many cases, having a full-stack developer working with a front-end specialist and a back-end engineer creates a strong team with smooth development, as the full stack can precisely interact with both ends and handle the middle ground, making the whole team more efficient.

  • How do you choose the best JavaScript developers for your project?

    Besides proficiency with JavaScript and at least one back- or front-end framework, the best JavaScript developers will follow best practices, know their way around Git, have experience maintaining a production project, and be able to quickly identify and resolve bugs. But their soft skills will also shine: effective communication and stakeholder management, strong attention to detail and a commitment to delivering high-quality work, and adaptability to thrive in the JavaScript ecosystem where frameworks, libraries, and environments are constantly changing. The best JavaScript developers will work confidently but not egoistically in order to effectively collaborate within and between teams.

  • How quickly can you hire with Toptal?

    Typically, you can hire a JavaScript developer with Toptal in about 48 hours. Our talent matchers are experts in the same fields they’re matching in—they’re not recruiters or HR reps. They’ll work with you to understand your goals, technical needs, and team dynamics, and match you with ideal candidates from our vetted global talent network.

    Once you select your JavaScript developer, you’ll have a no-risk trial period to ensure they’re the perfect fit. Our matching process has a 98% trial-to-hire rate, so you can rest assured that you’re getting the best fit every time.

  • What kind of JavaScript developer can help me?

    To properly answer this question, an understanding of the scope of the project is required. If you need to build a front-end-only website (without any database), then you need a front-end developer, who will usually use a framework like React, Angular, Next.js, Ember.js, Vue.js, or Svelte. If you only need to create an API or handle a database, you need a back-end developer, who will be specialized in back-end JavaScript technologies such as Node.js, MeteorJS, Backbone.js, or Express.js. Finally, if you need both front- and back-end developers—or if you’re unsure—a full-stack developer will be the safest option.

    Toptal’s JavaScript (and TypeScript) developers include experts in these technologies who will be able to guide you and help you achieve your project goals.

Edoardo Barp
Verified Expert 
in Engineering

Edoardo is a data scientist who has worked as a CTO and vice president of engineering, and started multiple projects and businesses. He specializes in R&D initiatives, having created analytics and security front ends with JavaScript, as well as several highly scalable back-end APIs, scrapers, and computational projects with Node.js. Edoardo has a master’s degree in applied mathematics from the University of Warwick.

Years of Experience


Previously at

Shift Technology

How to Hire a Great JavaScript Developer

JavaScript Developer Demand Continues to Dominate the Market

In today’s rapidly evolving technology landscape, hiring the right talent is more important than ever—which is especially true when it comes to JavaScript, the leading language for websites and web apps. Furthermore, when hiring a JavaScript developer, you’re not just looking for one skill: A diverse set of additional skills is required, the combination of which is highly dependent on each project. With this high demand for a complex skill set, it can be very challenging to find the right candidate.

According to the 2023 Stack Overflow Developer Survey, JavaScript continues to dominate the programming landscape for the 11th year running: 66% of professional developers use it. This immense popularity can be attributed to its versatility, ease of use, and robust ecosystem. With the advent of front-end frameworks and libraries such as React and Vue.js, as well as back-end ecosystems such as Node.js, JavaScript’s reach has expanded far beyond the browser to server-side and even mobile application development.

The JavaScript logo over a global map, with blue developer icons in various locations and a magnifying glass over a green developer icon.

As the language expands and the ecosystem improves, demand for skilled JavaScript developers increases. The US Bureau of Labor Statistics predicts that employment of web developers—largely including those proficient in JavaScript—will grow 23% for the decade ending in 2031, much faster than the overall average and nearly triple the rate from 2021. This increasing demand, coupled with a limited pool of experienced JavaScript developers, has made hiring for this role particularly challenging for employers.

In this guide, we discuss the essential skills and knowledge a proficient JavaScript developer should possess, as well as the significance of understanding popular frameworks and libraries. We delve into strategies for identifying candidates, such as crafting effective job descriptions, leveraging online assessments, and evaluating their problem-solving abilities, to find developers who can excel in your organization. Additionally, we explore best practices for onboarding and retaining top talent.

What attributes distinguish quality JavaScript Developers from others?

JavaScript is ubiquitous; therefore, JavaScript developers are ubiquitous as well. However, the sector in which JavaScript has its firmest grip is web development, both for the front end (the website as the user sees it) and the back end (what happens behind the scenes). Since there is limited overlap between the skills required for front- and back-end development, JavaScript roles are commonly separated along those lines:

Front End

A front-end developer typically uses a framework like React, Vue.js, or Angular, together with components and raw CSS, JavaScript, and HTML, in order to create the user-facing portion of a project. Front-end developers can complete some projects themselves—websites that involve no data storage, for example—but in a team context are often complementary to one or more back-end developers.

Back End

A back-end developer deals with all the processes that run on a central server instead of a user’s computer. A developer using JavaScript for back-end development will very often be a Node.js developer. Back-end developers are also responsible for databases, APIs, and user authentication. Nowadays, their code usually runs in the cloud, so experience with cloud platforms and deployment is a key skill to look for in candidates.

Full Stack

A full-stack developer is versed in both front- and back-end development. Usually, it takes time to become so well rounded. However, with the vast number of frameworks and libraries available, it has become more and more achievable to be a full-stack JavaScript developer without having accrued many years of experience. Note: While full-stack developers have a breadth of knowledge, it’s typical for some candidates to be stronger in front-end development while others will be stronger in back-end development. Be sure to understand your needs to ensure you hire the best candidate for your project.

Simply put, finding a quality JavaScript developer with the right expertise is key to transforming your project idea into reality.

How can you identify the ideal JavaScript Developer for you?

When hiring a JavaScript developer, it’s essential to consider their technical expertise, problem-solving abilities, and experience with relevant frameworks and libraries. The best JavaScript developers have not only a large portfolio and a track record of delivering high-quality projects, but also modern coding habits in line with the evolution of ECMAScript—JavaScript’s formal specification.

There is no one-size-fits-all approach to identifying the perfect candidate for your project, but these are the three most important aspects to take into consideration:

  1. Is the project starting from scratch?
If it is, you must look for an experienced developer who has participated in the greenfield stage of production-grade JavaScript or has maintained an existing project for at least a year; this is fundamental. Unwise architectural decisions will have a compounding effect on the final product and its long-term maintenance costs.
  1. Is there tech stack overlap?
JavaScript’s very large ecosystem increases the importance of specialization when hiring JavaScript developers. An experienced developer whose skills match your project’s tech stack and tooling may be more effective than an expert JavaScript generalist. For front-end JavaScript developers, check for experience in your project’s specific framework and APIs. Similarly, for back-end developers, look for matches in frameworks, authentication methods, and other libraries.
  1. Will they be under the supervision of a senior developer?

If there’s a senior JavaScript or TypeScript developer on the team who will be able to oversee the candidate, then you can opt for a developer with less experience, especially if they’re motivated. A passionate junior can do wonders if trained well, while being an economical choice. However, you can’t expect a junior developer to work on large features for at least the first few months, or their need for assistance will likely consume too much of their peers’ time.

To summarize, start your hiring process by clearly defining your project’s needs, skills gap, and problem statement(s). Then use that context to inform the level of developer you will hire. If your project requires starting from scratch or designing a new core feature, investing in expert talent is justified. However, for less-complex tasks or when working with a limited budget, a junior developer who will have adequate supervision or a mid-level developer with previous experience in the right skills can be a cost-effective solution.

Regardless of project context, there are many common skills to be aware of for anyone looking to hire JavaScript programmers:

Understanding of JavaScript syntax and data structures, such as arrays and objects, is the most basic requirement of a JavaScript developer—they cannot write code without it.

Knowledge of asynchronous programming, event handling, and callbacks is very important, allowing apps to accomplish tasks in parallel. When working with web technology in particular, developers will use external connections often, e.g., to fetch images from storage, make database requests, and call APIs. Without asynchronous programming, most server requests would cause webpages to take several seconds to load—a surefire way to lose customers.

Understanding of web development concepts, such as REST APIs, HTTP requests, and web security are key elements to look for in both front- and back-end JavaScript developers, as they involve how a website communicates with the back end and receives the required information to display to the user. A skilled developer will be able to implement APIs and security measures to protect applications from threats, ensuring seamless and safe user experiences.

Experience with version control systems, such as Git is a necessity for any developer, including juniors, as it allows collaborating on large teams, tracking code changes (to allow for backtracking), and resolving conflicts, all of which are integral throughout the project lifecycle.

Knowledge of software design patterns and coding best practices allows developers to create maintainable, scalable and, most importantly, readable code, making it easier for other developers to collaborate or take over projects.

The ability to write modular code makes it easier to understand, test, and maintain a large codebase. It allows for easier tracking of issues, simpler updates, and lower likelihood of conflicts between developers’ updates. A typical characteristic of more experienced developers is the ability to write properly modularized code.

Understanding testing and debugging techniques is one of the most important aspects of a developer’s job and also one of the most differentiating attributes between junior and senior developers. Bugs are part of the lifecycle of apps. So a developer should be familiar with standard testing methodology, know how to create a good test environment, and be adept at finding bugs quickly.

There are three more key skills that only apply to front-end development:

HTML, CSS, and DOM manipulation are the building blocks of the design of a website, and any front-end developer candidate should be experienced in using them. DOM manipulation encapsulates changes to a website that are visible to the user, e.g., animations or single-page apps. Even with modern frameworks where these aspects aren’t worked with directly very often, developers still need to know what’s happening behind the scenes to be effective.

Proficiency in using JavaScript frameworks and libraries, such as React, Angular, or Vue requires the ability to leverage these tools to build efficient, scalable, and maintainable web applications. Skilled developers understand the unique features, best practices, and nuances of each framework, enabling them to create interactive user interfaces and optimize application performance. It’s common for developers to concentrate their experience in a particular framework, so it’s worth filtering for this in projects where the framework has already been chosen.

Familiarity with browser compatibility issues and cross-browser testing involves understanding the differences among browsers and their rendering engines. Skilled developers address these discrepancies and perform cross-browser testing to ensure consistent user experiences across various platforms, devices, and browser versions, optimizing the application’s accessibility and reach.

Now that you know what you’re looking for among JavaScript developers for hire, you’re ready to craft a job description.

How to Write a JavaScript Developer Job Description for Your Project

Start with a solid template and include as many details as possible to try to narrow the channel of prospective applicants and thereby avoid drowning in applications. Here are some specific points you might include about your project to help applicants appropriately—but not too zealously—self-select:

  • The tech stack, tools, and industry
  • Whether the project is new or in process
  • The estimated length of the project
  • The expected outcome
  • The current team’s skills and gaps
  • Whether you are looking to hire full-time, part-time, or freelance JavaScript developers
  • Whether the position is remote, partly remote, or fully on-site

Companies looking to hire JavaScript developers may also want to approach the job description as one for:

What are the most important JavaScript Developer interview questions?

Interviews are more likely to yield a more balanced assessment if they include a mix of contextual questions—higher-level discussions about a project’s technical decisions or issues encountered—and more technical questions like these:

What is the difference between the concepts of null and undefined in JavaScript? And how do you handle them?

Null represents an intentional absence of any object value, while undefined represents a variable that has been declared but has not been assigned a value.

If a developer doesn’t need to know whether the variable is null or undefined, they can use a standard equality check against null; if they do, they’ll need a strict equality check. A good follow-up question: Ask the candidate to explain a time when they faced a situation needing a null check and the reasoning behind whether it needed to be strict or not.

What is the difference between the equality (==) and strict equality (===) operator? When should you use which?

The equality operator performs type coercion, which means it attempts to convert the operands to a common type before making the comparison. The strict equality operator never converts before comparing.

The equality operator is quite dangerous to use and is generally frowned upon since it can yield unexpected results, like the fact that an empty string is considered equal to the number zero when the two are coerced to the same type.

What are the differences between let, const, and var in JavaScript?

var is function-scoped and can be redeclared and reassigned. let and const are block-scoped, and let allows reassignment, while const does not.

It can also be fruitful to discuss a candidate’s choice of various tools and libraries for your upcoming JavaScript use cases.

The JS logo connected to icons for UI, Database, Authentication, Interactions, API, and Data Processing.

Lastly, as with the job description, it’s worth including questions about more specific technologies, e.g. Node.js, that are pertinent to your project.

Why do companies hire JavaScript Developers?

Businesses could leverage just about any programming language. What are the main features of JavaScript? What benefits does it provide over other languages? How does it help companies improve their bottom lines?

JavaScript is a general-purpose programming language that has gained a large part of the digital market. Increasingly, projects can be written from start to finish using only JavaScript: front end, back end, authentication, data processing, and more. The websites and digital products you use on a daily basis very likely use JavaScript as one of their main languages.

Uniformity Benefits

The language’s key attribute is its versatility, enabling developers to work seamlessly within a project where every component in the stack uses the same language. This uniformity promotes efficient resource sharing and simplifies development processes. For example, data validation is often done on both the front end (for a performant user experience) and the back end (for security). JavaScript lets both implementations use the same file, rather than a pair of files that can easily end up an out-of-sync source of security holes and user-repelling bugs.

However, the extensive scope of the language has inevitably led to numerous specializations, each with their own frameworks, libraries, and conventions. Hiring managers who understand this nuance are a great asset. For example, they’ll know that a React programmer has a better chance than an Express.js specialist at short-term effectiveness on a React Native project—even though anyone looking to hire JavaScript developers will see résumés with varying combinations of the three.

If you find yourself in the early stages of the hiring or architectural processes, you may still be considering the merits of JavaScript versus Java, TypeScript, Python, and/or PHP. How do you know which programming language is best for your next project?

All these languages rival JavaScript for web development, and each one has its pros and cons:

  • JavaScript versus Java – Java is one of the most common general-purpose development languages. Java has been a back-end option longer than JavaScript, and remains a significant back-end competitor. But to hire a Java developer over a JavaScript developer would negate the aforementioned uniformity benefits—which is equally true for Python and PHP.
  • JavaScript versus Python – Python is also very popular as a general-purpose language, particularly for data science and machine learning applications. For larger teams and projects, a Python specialist can leverage these benefits separately from a JavaScript or TypeScript back-end developer.
  • JavaScript versus PHP – PHP is an immensely popular language for back-end web development, its primary purpose. WordPress and Laravel’s popularity keep it well ahead of any challengers. Nonetheless, more PHP developers want to work with JavaScript than vice versa.
  • JavaScript versus TypeScriptTypeScript is one of the fastest-growing programming languages. TypeScript is a safer version of JavaScript, which should be the preference for any new projects whenever possible. TypeScript can import JavaScript; therefore, a project can mix the two languages, making for a smooth transition and likely explaining its impressive popularity growth. TypeScript is the only language to share the benefits of uniformity with JavaScript. Many JavaScript developers will know TypeScript or be able to pick it up quickly.

But only TypeScript—since its code gets converted to browser-native JavaScript—offers any serious front-end competition so far; Java, PHP, and Python are back-end languages in a web context. This may change, though, as Python can now be executed in the browser through PyScript.

In this guide, we covered several key aspects of JavaScript development and how to use those to your advantage when hiring. We described the difference between the front-end, back-end, and full-stack roles of a JavaScript developer. We also mentioned the key skills and traits to look for when hiring a JavaScript developer and how to gauge the relevance of a candidate’s experience within the vast ecosystem of frameworks and libraries. Finally, we briefly discussed what to include in a job description and interview to maximize each element’s effectiveness.

Whether you’re looking specifically for a TypeScript programmer, a Node.js engineer, an Angular expert, a full-stack developer, or some other JavaScript specialist, you’re now well equipped to find the right match for your project within an impressively broad subfield of software engineering.

Top JavaScript Developers are in High Demand.

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