Frontend Developer (React)

This job fits a Senior Frontend Developer with 5+ years experience specializing in React and TypeScript, familiar with Next.js, state management tools like Jotai, Zustand, or Redux, and proficient in testing frameworks (React Testing Library, Vitest, Playwright). The candidate should be experienced in building scalable frontends consuming REST APIs, familiar with CI/CD and Agile workflows, and able to work independently and collaboratively. Fluent Portuguese and English communication skills are required, ideal for professionals seeking remote work in Portugal within a growth-focused IT services company.

1. How do you manage state in React applications using libraries like Jotai, Zustand, or Redux?
   I choose the state management library based on the project complexity; for simple cases, I prefer Jotai or Zustand for their minimalism and performance, while Redux suits larger apps needing predictable state flows.

2. Describe your experience with Next.js and how it benefits React applications.
   Next.js enables server-side rendering and static site generation, improving performance and SEO; I leverage its routing, API routes, and incremental static regeneration for scalable React apps.

3. How do you ensure code quality and reliability using React Testing Library, Vitest, and Playwright?
   I write unit and integration tests with React Testing Library and Vitest for component logic and behavior, and use Playwright for end-to-end testing to simulate real user interactions.

4. What are your best practices for integrating RESTful APIs in React applications?
   I use hooks like useEffect and libraries such as React Query for efficient data fetching, caching, error handling, and synchronization with UI state.

5. How do you implement and maintain CI/CD pipelines for frontend projects?
   I configure pipelines to automate testing, linting, building, and deployment using tools like GitHub Actions or GitLab CI, ensuring fast, reliable releases.

6. How do you approach responsive design using HTML5 and CSS3 in React apps?
   I use modern CSS techniques like Flexbox and Grid, media queries, and CSS modules or styled-components for scoped styles to ensure mobile-first and adaptive layouts.

7. Explain how Agile methodologies influence your development workflow.
   I participate actively in sprint planning, daily stand-ups, reviews, and retrospectives to iteratively deliver features, adapt to feedback, and maintain team collaboration.

8. Describe a situation where you worked autonomously on a React project. How did you manage challenges?
   I planned tasks, prioritized issues, used thorough documentation, and maintained communication with stakeholders to independently deliver high-quality features on time.

9. How do you ensure accessibility and usability in your frontend development?
   I follow WCAG guidelines, use semantic HTML, ARIA roles, keyboard navigation support, and test with screen readers to build inclusive user interfaces.

10. What techniques do you use to optimize React app performance?
    I apply code-splitting, lazy loading, memoization with React.memo and useMemo, minimize re-renders, and optimize bundle size to improve load times and responsiveness.

WIRE IT, a Portugal-based IT services company, is looking for a Frontend Developer with 5+ years of React experience to join their remote team. You'll work with TypeScript, Next.js, state management (Jotai, Zustand, or Redux), and testing tools like React Testing Library and Playwright. The role offers a full-time contract, health insurance, 22+ paid vacation days, meal allowance, referral bonuses, and a strong culture focused on growth and collaboration. Fluent Portuguese and English required.