React continues to rapidly gain momentum. It has been climbing steadily since it broke 10 million downloads per month in June, 2018. React.js offers a desirable level of flexibility and performance for building scalable solutions with interactive UIs. No wonder a growing number of companies are beginning to embrace this technology. How to choose and hire React.js developers which will take your project to the next level? And how to make sure they are a perfect fit? We'll provide you with all the necessary information.
What is React.js?
What is the main difference between React.js and React Native?
The syntax and workflow of React.js and React Native are similar, but the execution is completely different.
React Native is tailored for building native mobile applications indistinguishable from the apps built with Objective-C or Java. Whereas React can be used for building web, mobile, desktop, and hybrid applications.
Basically, React Native uses the same fundamental UI building blocks as regular iOS and Android applications and puts them together with the help of React.js syntax to compose a rich mobile UI.
Why is React.js so Popular?
- React is highly performant: it uses a powerful reconciliation algorithm called Virtual DOM which is used to compare the current page structure with the planned page structure and update the right components as soon as your data changes;
- React is scalable: it uses a single language for server-side, client-side, and mobile applications;
- React is stable: it is backward compatible, which means it changes its interface only very rarely or not at all. This allows legacy projects to be upgraded to the latest version of React.js without changing the codebase or by making only a few minor tweaks;
- React is flexible: it can be easily combined with different state managers (e.g. Flux, Redux, Reflux, or Alt) and allows the application of various architectural patterns;
- React is component-based: it allows the creation of encapsulated components that manage their own state and composes them to make complex UIs;
- React is SEO-friendly: it can be processed on the server and the virtual DOM will be rendered to the browser as a regular web page.
Are React.js Developers in Demand?
Definitely, the demand for React.js developers is growing at a record pace. In total, React.js is now being used by almost 300,000 websites globally. Leading brands such as Twitter, Facebook, Atlassian, Cloudflare, Glassdoor, along with Fortune 500 companies are all using React.
Most Wanted Frameworks, Libraries, And Tools of 2018, by Developer Survey 2018 by Stack Overflow
Demand For React.js vs. Angular Developers
What is the Average React.js Developer Salary?
- United States – $88,478
- Canada – $63,187
- Australia – AU$70,000 ($50,000)
- United Kingdom – £36,599 ($47,615)
- Germany – €49,525 ($57,400)
- Netherlands - €41,148 ($48,200)
- Spain – €31,469 ($38,983)
- Austria – €38,973 ($45,172)
- Belgium – €36,358 ($42,141)
- Sweden - $57,321
- Singapore - S$53,861($39,369)
- Israel - ILS 234,220 ($65,758)
- New Zealand - NZ$56,992 ($37,570)
- Hong Kong - HK$313,808 ($39,983)
On the whole, the US remains an unprecedented leader in terms of software developer salary rates. The average salary rate in hi-tech cities such as San Francisco and New York may reach $110,071 and $99,317 per year accordingly.
However, the demand for React.js and React Native developers grows faster than local labor markets can keep up. Still, many companies have difficulties finding and hiring them locally.
No wonder offshore locations like Ukraine are becoming an attractive alternative for US and Western European companies looking for skilled and cost-effective engineers. The region offers a big number of software development companies, great price/quality ratio and a decent pool of Front-end developers with expertise in React.js.
According to Linkedin, more than 10,000 React professionals work in the country’s IT sector. Moreover, you can hire a React.js developer with more experience and a wider tech stack for the same or lower budget than locally.
What Technologies and Developers Types are Growing in Demand, by Developer Hiring Trends in 2017 by Stack Overflow
How to Choose and Hire the Best React.js Developers
Portfolio and References
The CV and portfolio of React.js developers can say a lot about the expertise they can offer. Firstly, pay attention to the candidate's experience, whether he has at least two years of experience in working with React and developed various single page applications (SPA).
Secondly, because the React community regularly releases new features and libraries, it’s essential for the candidate to follow the latest trends and monitor changes in React interface. Knowledge of the latest React-based libraries and tools can be a huge benefit as well.
In addition, you may ask for references or try to find feedback on your candidate’s work in the community and job forums. This allows you to have a better understanding of his capabilities.
Technical Skills any React Developer Should Have
- Experience in working with at least a couple of modern technologies such as Angular, Vue, Backbone JS, to have a clear understanding of React’s potential;
- Knowledge of different architectural patterns compatible with React and state managers based on the Flux approach;
- Background experience with adjacent technologies such as Node, Webpack, Babel, Redux, HTML5, and some of CSS preprocessors (Styled-Components, CSS-Modules, SASS, LESS);
- Knowledge of Jest for test coverage;
- Experience with React Native;
Top Interview Questions to Hire a React.js Developer
A well-orchestrated interview process is fundamental for selecting the right React.js Developers for a project. We suggest using our efficient 3-step interview scheme which consists of:
An initial personal interview
A test task (no longer than 4 hours)
A follow-up technical interview
This scheme will help you evaluate the candidate's soft and hard skills as well as his ability to react quickly to changing requirements and solve common development issues.
To help you hire a React.js developer faster, we've prepared a list of key questions to ask during the interview:
- What do you like most about React?
- What's the most difficult performance issue you've ever fixed with React.js?
- What can you tell about JSX?
- Can React be used without JSX?
- Can you describe the React component lifecycle?
- Can you compare and contrast various React component lifecycle methods?
- What are the stateless components in React?
- Can you tell the difference between state and props?
- What are the limitations of React?
- What's the difference between Real and Virtual DOM?
- Can you compare MVC with Flux?
- What's the difference between pure components and general components in React?
- How is React.js different from Angular?
- What is the significance of keys in React?
- How can you create an event in React?
- Explain the difference between React’s ES6 and ES5 syntax?
- How would you create Higher Order Components (HOC) in React?
- Can you tell the difference between createElement and cloneElement?
As you can see, the process of finding and hiring React.js and React Native developers can be quite challenging. Oftentimes, the demand exceeds the number of available experts. However, considering rising offshore locations (e.g. Ukraine) and taking into account the above-mentioned information, you will experience fewer difficulties when choosing the right fit for your project.
To make this process even more efficient, you may contact our experts and they will help you find and hire React.js developers and React Native developers faster and with minimum effort.