React Developer Jobs in Sweden

• Understanding of JavaScript Fundamentals: A React developer must have a strong grasp of JavaScript, including concepts like variables, data types, operators, loops, and control structures.
• ES6+ Features: Knowledge of modern JavaScript features like arrow functions, destructuring, spread/rest operators, template literals, classes, and modules is crucial. Familiarity with asynchronous programming (Promises, async/await) is also necessary.

• JSX (JavaScript XML): Understanding how to write and use JSX, which allows embedding HTML in JavaScript.
• Components and Props: Experience in creating and managing React components, passing data through props, and structuring applications with a component-based architecture.
• State Management: Proficiency in managing state within components using useState, useReducer, and familiarity with state management libraries like Redux, Recoil, or MobX.
• React Lifecycle Methods & Hooks: Knowledge of class component lifecycle methods (e.g., componentDidMount, componentDidUpdate) and mastery of React Hooks (e.g., useEffect, useContext, useMemo) for functional components.

• HTML5: Comprehensive knowledge of HTML semantics, structure, and best practices.
• CSS3: Ability to style components effectively using CSS, including Flexbox, Grid, and responsive design techniques. Knowledge of CSS preprocessors like SASS or LESS is a plus.
• Styled Components/CSS-in-JS: Experience with CSS-in-JS libraries like styled-components, Emotion, or similar, allowing for scoped and dynamic styling in React applications.

• Redux: In-depth understanding of Redux, including how to manage application-wide state, create reducers, and use middleware like Thunk or Saga for asynchronous actions.
• Context API: Proficiency in using React’s Context API for simple state management across components without the overhead of Redux.

React Router: Familiarity with React Router for handling navigation and routing within single-page applications (SPAs), including nested routes and dynamic route matching.

• Git Basics: Proficiency in using Git for version control, including cloning repositories, branching, committing changes, merging branches, and resolving conflicts.
• Collaboration: Understanding of how to collaborate on projects using platforms like GitHub or GitLab, including pull requests, code reviews, and CI/CD integration.

• Webpack/Babel: Understanding of module bundlers like Webpack and transpilers like Babel for building and optimizing React applications.
• NPM/Yarn: Proficiency in using package managers like NPM or Yarn to manage dependencies and scripts in a React project.

• RESTful APIs: Understanding of how to interact with REST APIs using fetch, axios, or other HTTP clients to retrieve and send data.
• GraphQL: Familiarity with GraphQL for more efficient data querying and manipulation, along with libraries like Apollo Client.Responsive and Adaptive Design

• Mobile-First Design: Ability to design and develop applications that work seamlessly across different screen sizes and devices.
• Cross-Browser Compatibility: Ensuring that applications function correctly in all major browsers.

• CI/CD Pipelines: Basic understanding of Continuous Integration and Continuous Deployment pipelines for automating the build, test, and deployment processes.
• Containerization: Familiarity with Docker and containerization concepts for developing and deploying React applications in a consistent environment.