Junior Front End Developer

We are looking for a Front-end Developer to work on the development of modern, high-performance, and accessible applications, with a strong focus on user experience and integration with authenticated APIs.

This professional will play a fundamental role in building and evolving the interfaces of an expanding e-commerce platform, ensuring quality, performance, development best practices, and visual consistency in deliverables.

Work model: On-site – São Paulo/SP

Employment type: Cooperated

Hours: Monday to Friday, 8:30 AM to 6:00 PM

Main responsibilities:

• Develop and maintain interfaces using React and Next.js
• Implement responsive layouts with a mobile-first focus
• Apply accessibility and usability best practices
• Integrate front-end with REST and GraphQL APIs
• Implement authentication via Bearer Token
• Optimize applications for SEO and performance
• Work with global state management (Zustand)
• Use Tailwind CSS or Styled Components in interface construction
• Collaborate with designers and back-end developers
• Ensure proper code versioning with Git/GitHub

Requirements:

• Proven experience with React and Next.js
• Mastery of HTML5, CSS3, and JavaScript (ES6+)
• Experience with deployment on Vercel
• Experience with REST API integration
• Knowledge of authentication via Bearer Token
• Practical experience with Zustand
• Experience with Tailwind CSS or Styled Components
• Minimum of 2 years of experience
• Experience with Git and code versioning

Differentials:

• Experience with micro-frontends
• Implementation of Middleware/HOC for protected routes (Next.js)
• Implementation of dark mode with preference persistence
• Code splitting (e.g., modals on demand)
• Experience with testing (Vitest, Jest, React Testing Library and/or Playwright)
• Refined error handling (retry/backoff, placeholders, etc.)
• Creation of reusable Design System (Button, Card, Input, etc.)
• Knowledge of SSR (Server Side Rendering) and SSG (Static Site Generation)