The Vital Guide to React.js Interviewing

React is a library developed by Facebook that has revolutionized the way we think about apps. Borrowing ideas from declarative, reactive, and functional programming, it makes developing highly interactive UIs a breeze. As such, it is something that every front-end developer should have in their tool belt. Finding the right engineer for all your React needs can be challenging. This hiring guide provides a set of insightful questions to help you identify amazing React developers who are experts in their field.

Find the right React.js interview questions

Read a list of great community-driven React.js interview questions.

Read them, comment on them, or even contribute your own.

Hire a top React.js developer now.
Toptal is a marketplace for top React.js developers, engineers, programmers, coders, architects, and consultants. Top companies and start-ups choose Toptal freelancers for their mission critical software projects.
Full
profile
Rafael ChitiUnited Kingdom
Rafael is passionate about change and trying new things, both professionally and in general with his life. He is a skilled web developer with over 8 years of experience. He loves startups and is extremely proactive.
[click to continue…]
React.jsCSSJavaScriptjQueryGitAgile Software DevelopmentMac OS
Hire
Full
profile
Pavel VlasovRussia
Pavel is a hardworking and analytical specialist who possesses strong problem-solving skills and a drive to learn new things. He is constantly looking to improve himself while growing in the computer science and technology fields. He prides himself on being polite, welcoming, and professional at all times.
[click to continue…]
React.jsCSS3CoffeeScriptJavaScriptAngularJSNode.jsGit
Hire
Full
profile
Antonios MinasGreece
Antonios is a senior software engineer specializing in front-end, WordPress, PHP, and JavaScript frameworks with more than six years of professional experience spanning from the IT sector to digital advertising. He is passionate about applying top-end solutions and software engineering patterns in order to solve complex problems.
[click to continue…]
React.jsPHPCSS3HTML5CSSLESSJavaScriptSQLTwitter BootstrapjQueryAJAXWordPressWooCommerce
Hire
Full
profile
Leonardo Andrés Garcia CrespoUnited Kingdom
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.
[click to continue…]
React.jsSQLRubyJavaScriptRuby on RailsASP.NET MVCGitHubAgile Software DevelopmentMac OS X
Hire
Full
profile
Tomas HolasCzech Republic
Tomas started as a Ruby on Rails enthusiast, but in 2010 he turned to JavaScript and never looked back. JavaScript has a really productive ecosystem, which is easy to hack on, and offers libraries for everything imaginable. Currently, he prefers to work with Angular, React, and NodeJS. Why hire Tomas? He strictly adheres to the KISS approach, prioritizing productivity over programmatic parlor tricks where a library is sufficient.
[click to continue…]
React.jsJavaScriptAngularJSNode.jsAgile Software Development
Hire
Full
profile
Rogério AraújoBrazil
Rogério is a full-stack developer with 15 years of experience with software development and architecture. He has worked on several projects for customers in Brazil and globally. The range of projects include mobile, applications, desktop, and enterprise search applications.
[click to continue…]
React.jsDelphiC#Objective-CPHPJavaScriptSQLJavaASP.NETAndroid SDKSpringJavaServer FacesASP.NET MVC
Hire
Full
profile
Alejandro HernandezArgentina
Alejandro got his Bachelor's in software engineering eleven years ago, and since then has been working for software companies of all sizes from all around the globe as a freelancer. Currently, he enjoys working as the technical lead on JavaScript projects, where his deep understanding of architecture and theory is most impactful.
[click to continue…]
React.jsJavaScriptjQueryNode.js
Hire
Full
profile
Wout MertensPoland
Wout has over two decades of experience developing for and administering Unix platforms such as Linux, Solaris, and OS X. He excels at programming back-end and front-end services in a variety of languages, and holds a Master's degree in Computer Architecture.
[click to continue…]
React.jsCoffeeScriptSQLJavaScriptjQueryMac OS XWordPress
Hire
Full
profile
Andreas DewesGermany
Andreas is a trained physicist with a PhD in experimental quantum computing and a degree in quantitative economics. As an entrepreneur, he has a passion for data analysis and software development and loves to tackle hard business problems with data. He has received numerous awards for his work on data analysis and his work on data privacy and big data has been featured in the national and international press.
[click to continue…]
React.jsPython
Hire
Full
profile
Sebastian IllingGermany
Sebastian is a talented and passionate full-stack developer with a focus on back-end and API development. He has years of experience working with different programming languages and web-frameworks. Coming from a start-up environment, he strives to be result-oriented and quality-driven.
[click to continue…]
React.jsPythonDjango REST FrameworkDjangoGit
Hire

React.js, a comprehensive JavaScript library for building user interfaces, has changed the way we think about front-end development. React.js has grasped the interest of the open source community and it is here to stay. However, the nuances and idiosyncrasies of React.js require extra caution when distinguishing between good JavaScript developers and true experienced React.js developers.

This sample job description for React.js developers will help you write the perfect job ad and assure that you easily find and hire the person that matches your specific criteria.

React.js Developer - Job Description and Ad Template

Company Introduction

{{Write a short and catchy paragraph about your company. Make sure to provide information about the company’s culture, perks, and benefits. Mention office hours, remote working possibilities, and everything else that you think makes your company interesting.}}

Job Description

We are looking for a great JavaScript developer who is proficient with React.js. Your primary focus will be on developing user interface components and implementing them following well-known React.js workflows (such as Flux or Redux). You will ensure that these components and the overall application are robust and easy to maintain. You will coordinate with the rest of the team working on different layers of the infrastructure. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality product is important.

Responsibilities

  • Developing new user-facing features using React.js

  • Building reusable components and front-end libraries for future use

  • Translating designs and wireframes into high quality code

  • Optimizing components for maximum performance across a vast array of web-capable devices and browsers

  • {{Add other relevant responsibilities here}}

Skills

  • Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model

  • Thorough understanding of React.js and its core principles

  • Experience with popular React.js workflows (such as Flux or Redux)

  • Familiarity with newer specifications of EcmaScript

  • Experience with data structure libraries (e.g., Immutable.js)

  • Knowledge of isomorphic React is a plus

  • Familiarity with RESTful APIs

  • Knowledge of modern authorization mechanisms, such as JSON Web Token

  • Familiarity with modern front-end build pipelines and tools

  • Experience with common front-end development tools such as Babel, Webpack, NPM, etc.

  • Ability to understand business requirements and translate them into technical requirements

  • A knack for benchmarking and optimization

  • Familiarity with code versioning tools {{such as Git, SVN, and Mercurial}}

  • {{Make sure to mention any other framework, libraries, or other technology relevant to your project}}

  • {{List education level or certification you require}}

Hire React.js developers now

Recent React.js Articles by Toptal Engineers

  • Trusted by: