Hire the top 3% of React.js development consultants

Toptal is a marketplace for top React.js services. Top companies and startups choose Toptal’s React.js development services for their mission-critical software projects.

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Hire Freelance React.js Development Consultants

Henrikh Kantuni

Freelance React.js Development Consultant

United StatesToptal Member Since September 25, 2018

Henrikh is a top-notch software developer with a master's degree from Georgetown University. He has extensive experience successfully working with more than 60 clients and has maintained consistently high reviews. Henrikh has a particular passion for competitive programming and participates in programming contests whenever possible.

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Ghassan Hallaq

Freelance React.js Development Consultant

CanadaToptal Member Since May 16, 2019

Ghassan is senior solution architect with over 20 years of experience at companies like CN, Morgan Stanley, and TD Bank. He has also architected a lot of big data solutions, and he is an expert in applying AI and machine learning in his solutions.

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Dima Sazonoff

Freelance React.js Development Consultant

United StatesToptal Member Since October 4, 2019

Dima has over 25 years of experience as a software engineer at both small startups and large organizations. A proficient full-stack developer, his expertise is in building scalable back-end services, high-frequency trading algorithms, UI, and mobile applications.

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Edward Lin

Freelance React.js Development Consultant

United StatesToptal Member Since December 11, 2013

Edward is a web architect, technology enthusiast, and problem solver. With over 12 years of industry experience, he has delivered scalable and robust software for high traffic, enterprise level mobile web and eCommerce applications.

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Leonardo Andrés Garcia Crespo

Freelance React.js Development Consultant

United KingdomToptal Member Since January 1, 2014

Leonardo is a lifelong fan of technology and is always trying to learn something new while keeping up to date with his favorite technologies. He has a very proactive personality, and he's always building something. He is currently heavily working with technologies such as React and GraphQL.

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Frédérique Mittelstaedt

Freelance React.js Development Consultant

United KingdomToptal Member Since September 16, 2017

Frédérique is a software engineer and entrepreneur with an MSc in theoretical physics from Imperial College London. He excels at building full-stack systems with the web, desktop and mobile apps, microservices, and external integrations. Frédérique co-founded an international marketing agency and three start-ups in developer tools, cybersecurity, and AI. He regularly releases TypeScript packages and contributes to other open-source projects.

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Gabriel Courtemanche

Freelance React.js Development Consultant

CanadaToptal Member Since June 7, 2018

Gabriel is a highly efficient and reliable professional who possesses a broad skill set for web application development. He's been working on a range of products and clients from working on scalability problems in production engineering teams at Shopify and Autodesk to launching new applications for startups. Most of his work consists of leading technical teams by creating an easy developer environment, fixing technical debt, providing best practices code example and mentoring devs.

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Kamil Jakubczak

Freelance React.js Development Consultant

PolandToptal Member Since June 17, 2017

Kamil is a React, React Native, and JavaScript enthusiast (with a small dose of .NET experience). He recently became hooked by mobile development, deployment, and whatever is needed for it, mostly due to React Native being superb and fun to work with.

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Nick Day

Freelance React.js Development Consultant

United KingdomToptal Member Since July 29, 2019

Nick is a front-end specialist who also has over a decade of back-end experience. He’s highly committed to quality and use of best practices and enjoys crafting simple solutions to complex problems.

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Kevin Bloch

Freelance React.js Development Consultant

SwitzerlandToptal Member Since December 20, 2016

PostgreSQL, JavaScript, Perl, and Haxe are among Kevin's specialties, but he has worked with many programming technologies since his interest began during grade school. The bulk of his career has been as a lead desktop and full-stack developer, but his favorite areas of focus are project management, back-end technologies, and game development. He works diligently alone, but also loves being part of a team.

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A Hiring Guide

Guide to Hiring a Great React.js Development Consultant

Toptal helps you hire proven React.js freelancers on demand, from its elite network of experts. See why top companies and startups trust Toptal to hire top React.js development freelancers.

Read Hiring Guide
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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
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Building a cross-platform app to be used worldwide
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Leading a digital transformation
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Testimonials

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

Tripcents

In addition to sharp technical skills, Faruk had a great attitude and is a really exceptional communicator. He always let us know where he was with his work, thoroughly and reliably. That's not always the case, and it made working remotely considerably easier. He was an easy integration into the team.

Leif Abraham, Co-Founder

AND CO Ventures Inc

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

Radeeus

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

ProHatch

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

PriceBlink

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

POSTIFY

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

Kognosi

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

Higgle

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

Mxit

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

Livepress

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

WhatAdsWork.com

How to Hire React.js Development Consultants through Toptal

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Talk to One of Our Industry Experts

A Toptal director of engineering will work you to understand your goals, technical needs, and team dynamics.
2

Work With Hand-Selected Talent

Within days, we'll introduce you to the right React.js development consultant for your project. Average time to match is under 24 hours.
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The Right Fit, Guaranteed

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

FAQs

  • How are Toptal React.js development consultants different?

    At Toptal, we thoroughly screen our React.js development consultants to ensure we only match you with talent of the highest caliber. Of the more than 100,000 people who apply to join the Toptal network each year, fewer than 3% make the cut. You'll work with engineering experts (never generalized recruiters or HR reps) to understand your goals, technical needs, and team dynamics. The end result: expert vetted talent from our network, custom matched to fit your business needs. Start now.

  • Can I hire React.js development consultants in less than 48 hours through Toptal?

    Depending on availability and how fast you can progress, you could start working with a React.js development consultant within 48 hours of signing up. Start now.

  • What is the no-risk trial period for Toptal React.js development consultants?

    We make sure that each engagement between you and your React.js development consultant begins with a trial period of up to two weeks. This means that you have time to confirm the engagement will be successful. If you're completely satisfied with the results, we'll bill you for the time and continue the engagement for as long as you'd like. If you're not completely satisfied, you won't be billed. From there, we can either part ways, or we can provide you with another expert who may be a better fit and with whom we will begin a second, no-risk trial. Start now.

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Eight Clear Signs That You're Ready to Hire a React Developer

React is a JavaScript library for building user interfaces (UIs) that was introduced by Facebook in March of 2013. It is increasingly becoming the go-to option for both developers and executives seeking a low-risk, interoperable, and reusable foundation for building their web and mobile applications.

Besides Facebook itself, the number of high-profile companies using React is massive and grows daily, including Airbnb, Walmart, Zillow, Wolfram Alpha, WeWork, and many others.

React is endorsed by a broad spectrum of companies.

Maybe you’ve already been considering React. Maybe you’re planning a new project and want to know what all the hype is about. Or maybe you want to re-architect an existing application or implement some new features within a large app.

Whatever your use case, we believe that React and its surrounding ecosystem will support that use case well and allow you to grow without the constraints usually found in legacy application architectures.

Brief React Programming Overview

React allows developers to implement interfaces in a composable, declarative way through the JSX syntax. For instance, the structure for an app may be implemented like this:

<div>
  <AppHeader authStatus={props.authenticated} user={props.user} />
  <AppContent>
    <UserFeed data={props.users} />
    <TickerFeed data={props.tickerData} />
    <AccountFinanceInfo data={props.financeData} />
  </AppContent>
  <AppFooter />
</div>

AppHeader, referred to as a “component,” may represent a brand logo, a list of primary navigation links, an authentication status, and a login widget. You can think of each component as its own “mini app.”

In fact, React applications can be structured in such a way that a large set of features can be shared as modules between code bases, or individual features implemented as standalone applications which can then be included in any JavaScript application or HTML page.

This composability allows developers to build applications that are easy to reason about and maintain, and even allows non-technical users more visibility into the structure of an application.

React is also fast at rendering the application (i.e., turning React code into HTML, CSS, and JavaScript in the DOM) and figuring out which updates should trigger DOM changes due to its unique “diffing” algorithm. Essentially, React knows what parts of your application should render based on changes to parameters passed to individual components. In addition, a variety of convenient lifestyle methods exist which allow developers to conveniently hook into various parts of this rendering sequence, giving the developer control (when necessary) to jump in and tell React what should and should not trigger a render.

Since React has a small footprint and does not force an application architecture, it can be (and is) used alongside existing frameworks and libraries. It is common to see projects which implement different pieces in competing frameworks for various reasons, including the skillsets of available development talent and the interoperability of legacy technologies.

Because of React’s simple design and fuss-free implementation, a variety of architectures can be utilized, and an incredible ecosystem of libraries augment React’s offering by introducing clean patterns for data management, network calls, internal event flow, and data structures.

In fact, Facebook defines patterns, such as Flux, but simply describes the architecture and allows libraries like Redux and Alt to take over the implementation.

Facebook also maintains libraries, such as Jest (for testing), Immutable (for better JavaScript data structures), and React Native (for using React code in mobile environments). In choosing React, your organization will be utilizing code maintained by one of the most sophisticated software development organizations in the world for their own needs.

Small libraries that work well together are more reminiscent of a Linux approach than a monolithic architecture. React programming itself is simple enough that its basic usage can be learned in a few days.

Even if a developer is not utilizing the most ideal architecture and ecosystem libraries right away, React work can go into production almost right away, while combining legacy code (such as jQuery network calls or an existing Angular or Backbone application) with new React components.

What this means is that over time, a React-based UI can morph into an architecture that is ideal for the unique business requirements at hand, rather than accepting the “square peg, round hole” approach offered by many monolithic frameworks.

React can also be leveraged inside native mobile codebases using React Native, adding a dimension that few other JavaScript libraries and frameworks can touch, and allowing for code reuse between web and mobile versions of an application without compromising on user experience quality.

Now that you know a bit more about React programming, here are eight clear signs that you’re ready to hire a React developer.

You’re Beginning a New Project and Want to Go with “Cutting-edge” Best Practices

When an organization embarks on a new project, the first questions asked often revolve around which tools, frameworks, and libraries to utilize. For new web applications, React is the obvious choice for foundational code.

Its flexibility, composability, and small footprint, along with the numerous strong libraries available for things like shared state management, form handling, network communication, Bootstrap support, etc. ensure clean, reusable code while maintaining your organization’s ability to remain flexible.

In addition, the development tooling often paired with React is pushing the envelope in every way. The React ecosystem supports advanced concepts like hot reloading and data store interaction for more interactive development. It also features interactive React developer tools available collectively as a browser plugin.

You Have an Existing Project Where Content Changes (Such as Updating Price Tickers) Happen via Manual DOM Manipulations

Just a few years ago, many developers were building applications that would interact directly with the DOM, i.e., they would use the browser API directly to update UI elements with new values.

Imagine a list of stock tickers or other live feed of data, and imagine needing to control adding elements, removing elements, and changing individual elements from hundreds of data sources. This is an approach that is very difficult to maintain.

Through its unidirectional data flow, React simplifies this process a great deal by allowing UI updates to happen automatically through a top-down data flow based on a data change in the component chain. JSX templates receive values from other data structures (such as a plain JavaScript object, an AJAX response, a Flux data store, etc.), and when these values change, the component knows it is receiving new properties and re-renders appropriately. For example:

/* Shows how the component is declared */
<StockTicker symbol="AAPL" price="157.42" />

/* Sample implementation of StockTicker */
function (props) {
  return <div>
    {props.symbol} {props.price}
  </div>
}

This makes implementing applications with many data sources much simpler. You only need to worry about maintaining your application’s internal memory, and not about managing the rendering of the UI, which React conveniently abstracts away.

You Want to Consolidate Your Web and Mobile Applications to Use a Single Code Base

A use case which we are hearing about more and more frequently is that companies want to reuse large portions of their UI structure and logic between platforms.

React Native provides a remarkably elegant way to do so, taking advantage of the JavaScript runtime included on iOS and Android to allow implementing components in native code. <AppHeader />, for instance, can be used directly inside an iOS codebase.

The developer still needs to write some native code, but data management, UI structure, and many other things execute within the JavaScript runtime, allowing for a high degree of code reuse across platforms. This means development budgets that go farther and skillsets that are more highly leveragable.

Your Existing Application Is Not Performant Enough, or You’re Worried about Future Performance

Many legacy JavaScript frameworks, especially those that implement two-way data binding through DOM interpolation, simply aren’t performant enough for complex interfaces that include many frequently rendered elements.

Even jQuery and vanilla JavaScript implementations that alter the DOM too frequently will often run into performance walls that React does not.

React can also be rendered from the server, meaning the hard work can happen on your servers and be delivered to your clients fully compiled for rapid painting to the DOM.

You Want to Wrap Legacy Code inside a More Modern Architecture

A big challenge for many organizations is that while they see the clear value presented by React and the accompanying ecosystem, they cannot justify throwing away existing code that works reasonably well. The good news is that a React application can both wrap or be rendered inside of an application implemented using another UI framework.

The reason for this is that a React application instance is bound to a single DOM element. This DOM element can be within or wrapping another application framework. We have frequently observed React projects which wrap Angular code and vice-versa. Libraries have even been written to make this particular interoperability simpler.

Granted, it’s ideal if your applications are developed with conceptual consistency—i.e., you don’t mix frameworks. But the reality of pressing business needs and the hours required to rewrite “code that works” makes this scenario all too common a requirement.

You Want to Make Your Application Easier to Test Automatically

Earlier we discussed React’s composability and how it makes React applications easier to structure and reason about. Another advantage offered by this composability is the ability to isolate system components into discrete pieces which can be individually tested.

Most React components simply render based on a list of properties provided top-down, so testing the effect of modifying the props a component accepts is remarkably simple.

Some React components also manage internal state, which can be controlled via a very simple API. This is also very easy to test.

An outstanding library of test suites for React, such as Jest, as well as interoperability with existing testing tools, such as Karma, Mocha, etc., make React an easy choice.

React can also be rendered without a browser—it is common to see React applications rendered from the server or inside a headless browser—which simplifies testing even further.

The fact is that React is quickly gaining further traction and consolidating its status as the leading JavaScript framework.

As it gains more mindshare among developers and more footholds in organizations, it will become increasingly important that every organization have at least a toe in React, and some proficiency in developing applications with React and attracting React talent.

Some of the smartest people in the front-end development community are building the tooling commonly used to build, support, and implement patterns within React architectures, and to say that your organization should consider exposure to them is an understatement.

React and the architectural patterns commonly found in the best applications represent an evolution in web development practices that cannot be ignored.

You Are Deeply Concerned with Long Term Maintainability

If you’ve been involved in many software development projects, you know that one of the most important parts of future-proofing your efforts is ensuring that your application can be supported for years to come.

Though the JavaScript ecosystem changes rapidly, React has remained remarkably stable. In fact, despite completely rewriting React in 2017, Facebook managed to keep backwards compatibility.

This stability means that when your team learns React, you can rest assured that this knowledge will be transferable and will stick around for years to come. In fact, Facebook’s own engineering integrity relies on it. Even IBM has blogged about React’s long-term maintainability.

Besides the backwards compatibility and remarkably stable API, one of the main reasons React is more maintainable than other UI libraries is because of its incredible composability. As discussed previously, React components can be embedded within each other, rendered inside raw HTML pages, or bundled as standalone applications with their own bootstrapping process. This flexibility ensures that as your project evolves, you will be able to easily adapt at least the React part of your application to your requirements.

React’s extreme composability will make things like full rewrites a thing of the past in yourcode base, as it is supremely easy to keep the good parts and isolate the bad parts.

Because React components so frequently work in isolation, it is often very easy to hire someone to maintain another developer’s work, and make changes without creating system-wide problems. It is safe to call React and its accompanying ecosystem one of the most easily maintainable approaches in application development.


The Exciting Choice and also the Safe Choice

The React community continues to thrive while pushing the envelope of modern software engineering. Development still proceeds quickly, and search volumes, job postings, and other measures of interest are showing no signs of diminishing.

And yet it maintains a rare stability. There was once a saying in enterprise software circles in the infancy of the software industry: “Nobody ever got fired for choosing IBM.” This is the status React now enjoys in the software world.

Postscript: How Do You Evaluate React Developers?

Assuming you’ve seen the signs and decided to hire someone for React development, how should you find the best one for your project?

While hiring React developers is in many ways similar to hiring JavaScript developers for other positions—these JavaScript interview questions could help in this case—we have found some characteristics that can help you find the best possible candidates.

A good, senior React developer should have a solid foundation of JavaScript-level knowledge. They should know the ins, outs, and quirks of the JavaScript language itself. They should have experience with common ecosystem tools, such as build tools and testing tools, and have experience working with multiple JavaScript frameworks and deploying JavaScript applications to production.

But beyond what’s needed for plain-vanilla JavaScript jobs, the candidate should have some experience with common React architectural patterns. They should be able to discuss the merits of libraries like Immutable.js, describe data flow in a Flux-based architecture, and know a bit about event-based programming models.

In addition, you’ll probably want the candidate to have some working back-end knowledge, as many application development projects often require a tight communication loop between the API designer, the devops automation team, and the front-end team.

Finally, the candidate should of course have a solid working knowledge of React. Things like JSX syntax, component lifecycle methods, higher-order components, and controlled components should all be second nature. This list of interview questions should help get you started with the technical part of interviewing a React developer. Enjoy!

Top React.js Development Consultants are in High Demand.

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