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Vlad L., React Developer

Last Updated: 13 Dec 2023
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- 8 years of proven professional expertise in the IT industry; - Advanced experience in Web Development using JavaScript 7+ years; - Solid experience in software development using ReactJS and React Native (6+ years); - Good experience in Web development using PHP; - Beginner experience in Web Development using Ruby on Rails; - Beginner experience in Web Development using Java; - Upper-Intermediate English

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React   6 yr.

React Native

React Native   2 yr.

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Mikayel B., React Developer

Last Updated: 4 Jul 2023

- 3+ years of work experience in IT - Experience with JavaScript, learned new technologies, like React, Redux, MobX, Saga, TypeScript - Intermediate English - Available ASAP

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React   3 yr.

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Denys V., React Developer

Klagenfurt am Woerthersee, Austria
Last Updated: 4 Jul 2023

- 5+ years of commercial experience in the IT industry as React Development - Proficient in various technologies and tools, including React, React Hooks, Redux, TypeScript, StyledComponents, and Git. - Experienced in working with large-scale web platforms and property management software. - Demonstrated ability to lead development teams, investigate project architectures, and deliver timely tasks. - Upper-Intermediate English

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Yuliia Sh., React Developer

Kharkiv, Ukraine
Last Updated: 4 Aug 2023

- Developing web applications using JavaScript, React and Flux architecture - Strong experience in development highly loaded systems - Project deployment - Modular, scalable and reusable code - Supervising the subordinates various technologies - Good logical thinking and team player - Analytical thinking - Communicative and team player - Intermediate English - Availability starting from ASAP

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Eugene V., React Developer

Lviv, Ukraine
Last Updated: 21 Jul 2023

- 5+ years of experience in the IT industry as the front-end engineer (React, Vue) - Skilled React Engineer with extensive experience in full-stack and front-end development. - Proven expertise in creating web applications for various industries, including ordering and delivery systems, textile factories, marketplaces, dental medicine, and studying platforms. - Proficient in React, TypeScript, Redux, Vue.js - Strong understanding of REST APIs and integration with Google Maps API. - Experienced in code review, bug fixing, and refactoring to ensure optimal performance. - Skilled in project infrastructure setup, deployment, and repository maintenance. - Upper-Intermediate - Available ASAP

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I worked with Upstaff engineers for over 2 years, and my experience with them was great. We deployed several individual contributors to clients' implementations and put up two teams of upstaff engineers. Managers' understanding of tech and engineering is head and shoulders above other agencies. They have a solid selection of engineers, each time presented strong candidates. They were able to address our needs and resolve things very fast. Managers and devs were responsive and proactive. Great experience!

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Leaving a review to express how delighted I am to have found such a great side gig here. The project is intriguing, and I'm really enjoying the team dynamics. I'm also quite satisfied with the compensation aspect. It's crucial to feel valued for the work you put in.Overall, I'm grateful for the opportunity to contribute to this project and share my expertise. I'm thrilled to give a shoutout and recommendation to anyone seeking an engaging and rewarding work opportunity.

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Table of Contents

Cases when React does not work

Does not work
  1. When the developer lacks knowledge of JavaScript: React is a JavaScript library, and a solid understanding of JavaScript is essential to effectively utilize React. Without a foundational understanding of JavaScript concepts like functions, variables, and data types, it would be challenging to work with React and build complex applications.
  2. When there is no need for a dynamic user interface: React is primarily designed to build dynamic and interactive user interfaces. If the project requirements do not involve complex UI components that need frequent updates, using React might be an overkill. In such cases, a simpler framework or library that focuses on static content may be more suitable.
  3. When the project requires minimal interactivity: React shines when building applications that require a high level of interactivity. However, for projects that involve minimal user interactions and are more focused on delivering static content or serving as a content management system, using React may not be the most efficient choice.
  4. When server-side rendering is a priority: React is well-known for its ability to render components on the client-side, providing a rich user experience. However, if server-side rendering is a critical requirement for your project, there are other frameworks like Next.js that offer better support and performance for server-side rendering out of the box.
  5. When the project has tight performance constraints: Although React is known for its efficiency and performance optimizations, it may not be the best choice for projects with extremely tight performance requirements. In such cases, using a more lightweight framework or library that specializes in performance, like Preact, may be a better fit.
  6. When the project requires extensive DOM manipulations: React abstracts away direct DOM manipulations by utilizing a virtual DOM. While this improves performance and simplifies development in many cases, there may be scenarios where direct DOM manipulation is necessary for specific project requirements. In such cases, using a library or framework that provides direct DOM manipulation capabilities, like jQuery, might be more suitable.

How and where is React used?

How and where
Case NameCase Description
1. FacebookReact was developed by Facebook for their own use. It is the foundation of the Facebook web application, allowing for efficient rendering of dynamic and interactive components. React’s virtual DOM enables fast updates and optimizations, making it ideal for handling large-scale applications with high user engagement.
2. InstagramInstagram, another popular social media platform, adopted React to enhance the performance and user experience of their application. React’s component-based architecture and reusability features allowed Instagram to efficiently handle the complex UI requirements and seamlessly integrate new features.
3. AirbnbAirbnb, the online marketplace for vacation rentals, leveraged React to build a responsive and interactive user interface. React’s declarative syntax and efficient rendering enabled Airbnb to create a smooth booking experience and provide real-time updates to users.
4. NetflixReact has played a crucial role in the development of Netflix’s web application. React’s performance optimizations and ability to handle complex UI interactions have helped Netflix deliver a seamless streaming experience to millions of users worldwide.
5. WhatsAppWhatsApp, the widely used messaging application, incorporated React for its web version. React’s component-based structure allowed WhatsApp to build a scalable and responsive user interface, ensuring a consistent experience across different devices.
6. DropboxDropbox, the file hosting service, embraced React to improve the performance and responsiveness of their web application. React’s virtual DOM and efficient component rendering enabled Dropbox to handle large file uploads and provide a smooth user experience.
7. SlackSlack, the popular communication and collaboration platform, chose React to power their web client. React’s modular architecture and efficient updates allowed Slack to handle real-time messaging and provide a seamless user experience even with high message volumes.
8. AtlassianAtlassian, the company behind popular tools like Jira and Confluence, adopted React to enhance their web applications. React’s component reusability and performance optimizations helped Atlassian deliver responsive and interactive interfaces to their users.
9. GitHubGitHub, the world’s largest platform for hosting and collaborating on code repositories, utilized React to build their web interface. React’s virtual DOM and efficient rendering enabled GitHub to handle complex code navigation and provide a smooth code reviewing experience.

What are top React instruments and tools?

Instruments and tools
  • React DevTools: React DevTools is a browser extension that allows developers to inspect and debug React component hierarchies in Chrome and Firefox. It was released in 2014 and has become an essential tool for React developers. With React DevTools, developers can examine the component tree, inspect component props and state, and even make changes to the application’s state on the fly.
  • Redux: Redux is a predictable state container for JavaScript applications, primarily used with React. It was created by Dan Abramov and Andrew Clark in 2015. Redux provides a centralized store for managing the state of an application and offers a predictable way to update and access that state. It has gained popularity for its simplicity and scalability, making it a go-to tool for managing complex application states.
  • Next.js: Next.js is a framework for server-rendered React applications. It was developed by Zeit in 2016 and has gained significant traction in the React ecosystem. Next.js provides built-in server-side rendering, automatic code splitting, and easy routing, making it a powerful tool for building fast and SEO-friendly React applications.
  • Storybook: Storybook is an open-source tool for developing UI components in isolation. It was created by the team at Chroma in 2015. With Storybook, developers can build and test components in isolation, allowing for better collaboration and faster development. It provides a sandbox environment for developing and documenting components, making it an excellent tool for component-driven development.
  • React Router: React Router is a routing library for React applications. It was developed by Ryan Florence and Michael Jackson in 2014. React Router provides a declarative way to handle routing in a React application, allowing developers to create dynamic and navigable user interfaces. It has become the de facto standard for routing in React applications.
  • Enzyme: Enzyme is a JavaScript testing utility for React applications. It was created by Airbnb in 2015. Enzyme provides a set of testing utilities that make it easier to manipulate, traverse, and assert React components’ output. It has become widely adopted in the React community for its simplicity and powerful testing capabilities.
  • React Native: React Native is a framework for building mobile applications using React. It was developed by Facebook in 2015. React Native allows developers to write mobile apps using JavaScript and share a significant amount of code between iOS and Android platforms. It has gained popularity for its ability to deliver native-like performance and user experience while leveraging the power of React.
  • Material-UI: Material-UI is a popular React UI framework that implements Google’s Material Design principles. It was created by Olivier Tassinari and Matt Brookes in 2014. Material-UI provides a set of pre-designed components and styles that adhere to the Material Design guidelines, making it easy to build visually appealing and consistent React applications.

Pros & cons of React

Pros & cons

7 Pros of React

  • Improved Performance: React uses a virtual DOM, which allows it to efficiently update only the necessary parts of a user interface. This results in faster rendering and improved overall performance.
  • Reusable Components: React promotes the use of reusable components, which can significantly reduce development time and effort. These components can be easily composed together to build complex user interfaces.
  • Easy to Learn: React has a relatively shallow learning curve compared to other JavaScript frameworks. It has a simple and intuitive syntax, making it easier for developers to grasp and start building applications quickly.
  • Strong Community Support: React has a large and active community of developers who contribute to its growth and provide support through forums, tutorials, and open-source projects. This ensures that developers can easily find resources and solutions to any problems they encounter.
  • SEO-Friendly: React allows server-side rendering, which means that search engines can easily crawl and index the content of React applications. This can improve search engine visibility and ultimately lead to better organic traffic.
  • React Native: React can be used to develop mobile applications using React Native. This enables developers to use the same codebase for building both web and mobile applications, saving time and effort.
  • Backed by Facebook: React is developed and maintained by Facebook, which ensures its continuous improvement and stability. Being supported by a tech giant like Facebook also gives developers confidence in its reliability and future prospects.

7 Cons of React

  • Steep Learning Curve for Beginners: While React is easy to learn for experienced JavaScript developers, it can be challenging for beginners who are new to web development. Understanding concepts like JSX, virtual DOM, and component lifecycle can take time.
  • Complex Tooling: React ecosystem relies on various tools and libraries like Babel, Webpack, and Redux. Configuring and setting up these tools can be overwhelming for developers, especially those who are new to the React ecosystem.
  • JSX: JSX, a syntax extension used in React, can be unfamiliar to developers who are used to writing plain JavaScript or HTML. It may take some time for developers to get comfortable with JSX and understand its syntax and rules.
  • Component-Based Architecture: While component-based architecture is one of React’s strengths, it can also become complex to manage as the application grows in size and complexity. Proper organization and communication between components become crucial to maintain code maintainability.
  • Overhead of Virtual DOM: While the virtual DOM in React improves performance, it also introduces some overhead in terms of memory usage and processing power. In certain cases, the performance gain may not be significant enough to justify the added overhead.
  • Limited Documentation: Although React has extensive documentation, some areas may still lack detailed explanations or examples. This can make it challenging for developers to find solutions to specific problems they encounter during development.
  • High Pace of Development: React is known for its fast-paced development, which can result in frequent updates and changes to the framework. This can sometimes lead to compatibility issues or the need for developers to constantly update their codebase to keep up with the latest changes.

TOP 11 Facts about React

Facts about
  • React is a JavaScript library for building user interfaces.
  • React was developed by Facebook and is currently maintained by Facebook and a community of individual developers.
  • React was first released in May 2013.
  • React follows a component-based architecture, where UIs are built by composing reusable components.
  • React uses a virtual DOM (Document Object Model) to efficiently update and render UI components.
  • React allows for declarative programming, where developers describe what the UI should look like, and React takes care of updating the UI to match the desired state.
  • React has a large and active community, with numerous open-source libraries and tools available to enhance development productivity.
  • React is widely used by many popular websites and companies, including Facebook, Instagram, Airbnb, Netflix, and more.
  • React can be used to build both web applications and mobile applications using frameworks like React Native.
  • React has a strong ecosystem, with a rich set of documentation, tutorials, and learning resources available for developers to get started quickly.
  • React has a vibrant job market, with many companies actively seeking developers with React skills.

Let’s consider Difference between Junior, Middle, Senior, Expert/Team Lead developer roles.

Seniority NameYears of experienceResponsibilities and activitiesAverage salary (USD/year)
Junior Developer0-2 yearsAssisting in the development of software applications, writing code based on specifications, debugging and testing code, learning and applying new technologies, collaborating with senior developers.$50,000 – $70,000
Middle Developer2-5 yearsDesigning and implementing software solutions, writing clean and efficient code, participating in code reviews, analyzing and improving existing codebases, mentoring junior developers, collaborating with cross-functional teams.$70,000 – $90,000
Senior Developer5+ yearsLeading the development of complex software systems, architecting scalable solutions, optimizing performance and scalability, providing technical guidance and mentoring, conducting code reviews, collaborating with stakeholders and product managers.$90,000 – $120,000
Expert/Team Lead8+ yearsLeading a team of developers, setting technical direction and strategy, making critical technical decisions, overseeing project timelines and deliverables, coordinating with other teams, providing mentorship and guidance, ensuring quality and performance standards are met.$120,000 – $150,000+

TOP 10 React Related Technologies

Related Technologies
  • JavaScript

    JavaScript is a fundamental programming language for React software development. It is the primary language used for building React applications, and having a strong understanding of JavaScript is crucial for effective development. It is a versatile language that enables developers to create interactive and dynamic web applications.

  • React

    React is a JavaScript library for building user interfaces. It is widely adopted in the industry and offers a component-based approach to web development. React allows developers to build reusable UI components, making the development process more efficient and scalable. It provides a virtual DOM, which enhances performance by minimizing direct manipulation of the actual DOM.

  • Redux

    Redux is a predictable state container for JavaScript apps. It works seamlessly with React and helps manage the application state in a centralized manner. Redux follows a unidirectional data flow, making it easier to debug and test applications. By using Redux, developers can maintain a single source of truth for the entire application state.

  • Webpack

    Webpack is a popular module bundler for JavaScript applications. It is commonly used in React projects to bundle and optimize the code. Webpack offers features like code splitting, lazy loading, and hot module replacement, which enhance the performance and development experience. It allows developers to manage dependencies and build efficient production-ready bundles.

  • Babel

    Babel is a JavaScript compiler that transforms modern JavaScript code into backward-compatible versions. It is often used in React projects to transpile JSX syntax and ES6+ features into browser-compatible JavaScript. Babel enables developers to write modern JavaScript code without worrying about browser compatibility issues.

  • ESLint

    ESLint is a popular JavaScript linter that helps enforce coding style and identify potential errors in code. It is commonly used in React projects to maintain code quality and consistency. ESLint provides configurable rules and plugins, allowing developers to customize it according to project requirements.

  • Jest

    Jest is a powerful JavaScript testing framework that is frequently used in React software development. It provides a simple and intuitive API for writing unit tests, snapshot tests, and mocking functions. Jest offers features like code coverage reporting and parallel test execution, making it an excellent choice for testing React applications.

Soft skills of a React Developer

Soft skills

Soft skills are essential for a React Developer as they complement technical expertise and contribute to a successful career. Here are the soft skills required at different levels of experience:


  • Strong Communication: Ability to effectively communicate with team members, stakeholders, and clients to understand requirements and convey ideas.
  • Problem-solving: Aptitude for analyzing and resolving coding issues, debugging errors, and finding efficient solutions.
  • Adaptability: Flexibility to adapt to new technologies, frameworks, and project requirements.
  • Collaboration: Willingness to work in a team, collaborate with others, and contribute to collective goals.
  • Time Management: Capability to prioritize tasks, meet deadlines, and manage workload efficiently.


  • Leadership: Ability to take ownership of projects, guide junior developers, and coordinate with other teams.
  • Mentoring: Skill to mentor and coach junior developers, provide guidance, and share knowledge.
  • Client Management: Proficiency in managing client expectations, understanding their needs, and ensuring client satisfaction.
  • Conflict Resolution: Capability to identify and resolve conflicts within teams, ensuring a harmonious and productive work environment.
  • Attention to Detail: Thoroughness in reviewing code, identifying potential issues, and ensuring high-quality deliverables.
  • Continuous Learning: Eagerness to stay updated with the latest trends, frameworks, and best practices in React development.
  • Team Player: Ability to work collaboratively, share ideas, and contribute to the success of the team.


  • Project Management: Proficiency in managing complex projects, coordinating resources, and ensuring successful project delivery.
  • Strategic Thinking: Ability to think strategically, identify long-term goals, and plan for the future.
  • Client Relationship Management: Skill to build and maintain strong relationships with clients, understand their business needs, and provide solutions accordingly.
  • Technical Leadership: Capability to provide technical guidance, mentor junior developers, and lead architectural decisions.
  • Innovation: Aptitude for exploring new technologies, proposing innovative solutions, and driving technological advancements.
  • Empathy: Ability to understand and empathize with team members, clients, and end-users, ensuring a user-centric approach.
  • Business Acumen: Understanding of business objectives, market trends, and the ability to align technical solutions with business goals.

Expert/Team Lead

  • Strategic Planning: Skill to develop and execute long-term strategies, aligning technical initiatives with organizational goals.
  • Team Management: Proficiency in managing and leading development teams, assigning tasks, and fostering a collaborative work environment.
  • Decision-making: Ability to make informed decisions, consider multiple factors, and assess risks and benefits.
  • Conflict Resolution: Capability to handle complex conflicts within teams, mediate disputes, and maintain a positive work atmosphere.
  • Influence: Skill to influence and inspire team members, stakeholders, and clients, driving the success of the projects.
  • Presentation Skills: Proficiency in delivering effective presentations, explaining technical concepts to non-technical audiences, and gaining buy-in.
  • Strategic Partnerships: Ability to build strategic partnerships with clients, vendors, and external stakeholders to enhance business opportunities.
  • Thought Leadership: Capability to contribute to the industry through publications, conference presentations, and participation in technical communities.
  • Team Empowerment: Skill to empower team members, foster their growth, and create an environment conducive to innovation and creativity.
  • Conflict Resolution: Capability to handle complex conflicts within teams, mediate disputes, and maintain a positive work atmosphere.
  • Business Strategy: Understanding of market dynamics, competition, and the ability to align technical solutions with business strategies.

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