Frontend Engineer (React.js)

This role fits a Mid-level Frontend Engineer with 3-5 years of experience in React.js and JavaScript/TypeScript, skilled in building reusable components, consuming REST/GraphQL APIs, and working with modern frontend tools like Redux, Jest, Webpack, and Cypress. The candidate should be comfortable with frontend infrastructure, responsive design, accessibility standards, CI/CD pipelines, and collaborative agile environments. Ideal for a proactive, communicative developer passionate about crafting scalable, maintainable web and mobile applications within a fast-paced, inclusive startup culture.

1. How do you design reusable front-end components in React?
   I build modular, self-contained components that manage their own state where appropriate, use props for configuration, and follow design system guidelines to ensure consistency and maintainability.

2. What experience do you have with state management in React?
   I use Redux or Context API for global state, and prefer hooks like useState or useReducer for local component state, aiming for predictable and performant state updates.

3. How do you handle asynchronous programming in JavaScript/TypeScript?
   I leverage async/await syntax for readability, handle errors with try/catch, and use Promises for concurrency control, ensuring smooth UI updates during data fetching.

4. What tools do you use for testing React applications?
   I use Jest for unit testing, React Testing Library for component behavior testing, and Cypress or Enzyme for end-to-end and integration tests, ensuring robust and reliable code.

5. How do you integrate REST and GraphQL APIs in your frontend projects?
   I use fetch or Axios for REST and Apollo Client or Relay for GraphQL, handling query caching, loading, and error states to provide smooth user experiences.

6. Explain your approach to responsive design and cross-browser compatibility.
   I use CSS frameworks like Bootstrap or Material UI, along with media queries and flexible layouts, and test across multiple browsers and devices to ensure consistent behavior.

7. How do you ensure your React code is maintainable and scalable?
   I follow SOLID principles, write clear and documented code, break down complex components, use TypeScript for type safety, and enforce code quality with linting and peer reviews.

8. What’s your experience with CI/CD and DevOps practices for frontend?
   I configure pipelines using tools like Jenkins, GitHub Actions, or GitLab CI to automate testing, builds, and deployments, ensuring fast and reliable delivery.

9. How do you mentor junior developers?
   I provide constructive code reviews, share best practices, pair program, and encourage knowledge sharing through documentation and team discussions.

10. How do you collaborate effectively in cross-functional teams?
    I maintain clear and proactive communication, participate in planning and retrospectives, align on requirements with product and design, and use tools like Jira and Slack for coordination.

Velotio Technologies is seeking a Frontend Engineer skilled in React.js to build reusable components and scalable frontend architectures for enterprise software used by millions. Join a collaborative team of engineers and product leaders to translate designs into high-quality code, mentor peers, and shape core frontend infrastructure. Bring 3-5 years of React and JavaScript/TypeScript experience, strong API integration skills, and knowledge of modern frontend tools and best practices. Enjoy a flat, empowered culture with fast decision-making, inclusive environment, and growth opportunities. Remote-friendly in India.