Hire Pre-Vetted
React Developers

The process of hiring React Developers is easy and a 4-step process that goes like this:

• Step 1: Describe your needs
• Step 2: Within two days, meet with the best React developers
• Step 3: We will schedule an interview for you.
• Step 4: Select the best candidates and delegate the onboarding procedures to us

Reactdevelopers.io only works around React, thus we know what our clients want and what expertise a React developer should have before working on a clients’ project. Moreover, our developers go through the following interview stages to be a part of our network:

• Screening for qualifications and experience
• Language ability
• Assessment of aptitude
• Technical skill evaluation

The skill sets you want on board depend on your needs. Therefore, you must be aware of the abilities to search for in ReactJS engineers. Below, let's examine a few of them:

• Expertise in JSX and JavaScript: Given that ReactJS is a JavaScript library, it is essential to have a solid foundation in both of these languages.
• Proficiency with React Tools:Knowledge of Redux, Flux, and React Router can be quite beneficial.
• Component Lifecycle: It's important to comprehend mounting sequence and lifecycle methods.
• Performance Tuning: Proficiency in optimizing components for optimal performance across all platforms and browsers.
• Testing and Debugging: Capacity to optimize the use of Jest, Enzyme, and the React testing library, among other tools.

Technical Questions:

1. What are the distinctions in React between class and functional components?
   ES6 classes are used to specify class components. They typically feature lifecycle methods and a render method. They are able to store lifecycle logic and local states. Conversely, functional components are defined using straightforward JavaScript functions that yield JSX, and they are significantly simpler. The functional components can now hold state and side effects as hooks enter the picture.
2. Could you elaborate on the role that keys play in React?
   Rendering lists makes keys very important. They assist React in identifying the things that have been added, modified, or removed from the list. As a result, updating and synchronising the virtual DOM with the real DOM may be done effectively. It could aid in performance optimisation all around.
3. In React, how would you manage asynchronous operations?
   Asynchronous activities can be effectively controlled when capabilities like async/await are used in conjunction with React's lifecycle methods or hooks (particularly the useEffect hook). This can guarantee that the data flow is continuous and the user interface is constantly responsive.
4. Explain the distinction between an uncontrolled and a controlled component.
   The state of the element is managed by React, and React also controls its value. To obtain precise data for that, the component's function and state are utilised. It enables the DOM manage the value of the element in the event of an uncontrolled component. This does not communicate its state to React until a ref is used.

Situation-specific Questions:

1. Assume a performance slowdown is being caused by a user-facing feature. Using React's built-in DevTools to uncover performance issues can be an excellent idea. How would you diagnose and fix the problem?
   Performance problems can be solved by optimising memorisation, slow loading, or dividing components after identifying the troublesome component or logic
2. Describe a circumstance in which you had to incorporate a third-party library into a React programme. How did you make sure it didn't interfere with already-installed features?
   It is very important to isolate the third-party library integration implementation. It must be tested in a variety of settings and for a range of interactions. A comprehensive examination to detect incompatibilities with current features is required to provide appropriate error handling and seamless integration.
3. How would you respond if an update to one component was having unintended consequences and updating other areas of the user interface as well?
   React's PureComponent or the shouldComponentUpdate lifecycle function seem like sensible choices under these circumstances. These tools have the ability to handle pointless re-renders and only permit the updating of relevant components. It can improve UI uniformity and maintain speed.

Project Based Questions:

1. Could you describe a difficult issue you ran into in a previous project and how you resolved it?
   One of the previous projects we worked on had a significant state management difficulty. The issues increased in complexity in tandem with the application's developing complexity. Together, we deliberated over all the viewpoints and came up with a workable answer. We made the choice to incorporate Redux, a state management framework, which provided us with a centralised storage and an efficient data flow. We were able to provide uniformity throughout the application in this way.
2. Give an example of a project in which you collaborated closely with backend engineers. How did you make sure the partnership went well?
   When collaborating on a project with a team, communication clarity is crucial. Keeping thorough documentation, holding frequent sync-up meetings, and making full use of tools like Postman for API testing may ensure that every team member is in agreement.

Soft Skills Questions:

1. In particular, how do you respond to criticism that calls for going over a large portion of your code again?
   When used constructively, feedback may be a fantastic tool for development. After obtaining comments, it can be quite beneficial to mutually comprehend the concerns through discussion. Making the required code adjustments and learning from team members' fresh viewpoints and insights won't do any harm. A constructive approach like this might ultimately improve the final result.
2. Describe an instance in which you and a team member disagreed. How did you handle it?
   The best method to handle disagreements is to have an open discussion about them. through exchanging and comprehending various viewpoints. Respecting individual viewpoints while maintaining focus on the project's main objective will lead to a mutually agreeable outcome.