React.js developers design and implement user interface components for JavaScript-based web and mobile applications using the React open-source library ecosystem. These skilled front-end developers are involved in all stages of interface component design, from conception through to final testing. 

Roles & Responsibilities:

• A frontend developer, who is passionate about user interface design and have skills in JavaScript frameworks such as Angular, React or Vue.js.
• Efficient use of imagination to artistically create beautiful user-friendly designs.
• Strong skills with HTML5, CSS3, Twitter Bootstrap and experience in building responsive web applications.
• Knowledge of REACT tools including React.js, Webpack, Enzyme, Redux, and Flux.
• Experience with user interface design.
• Knowledge of performance testing frameworks including Mocha and Jest.
• Optimizing applications for improved performance
• Have a keen eye to discover, evaluate, and implement new technologies to maximize development efficiency and improve user experience.  

Requirement:

• Bachelor’s degree in computer science, information technology, or a similar field.
• Experience with browser-based debugging and performance testing software.
• Excellent troubleshooting skills.
• Good project management skills. 
• Understanding of RESTful APIs/GraphQL, HTML/CSS, ES6 (variables and scoping, array methods), code versioning tools like GIT, SVN, etc., popular frontend development tools, CI/CD tools, DevOps.
• performance testing frameworks like Mocha, Node + NPM

Experience: 0 to 5 years