Job Summary: We are seeking a Web Developer with solid experience in React.js and Next.js to join a technical and collaborative team, delivering robust and scalable solutions. Key Highlights: 1. Experience with React.js and Next.js in high-performance applications 2. Participation in front-end architecture decisions and mentorship 3. Collaboration with cross-functional teams (product, UX, backend) **Job Description:** We are looking for a **Web Developer** with solid experience in **React.js** and **Next.js**, developing modern, scalable, and high-performance applications. The ideal candidate for this position has mastery of core JavaScript ecosystem technologies, strong front-end architectural capability, sound engineering practices, and proven experience in complex projects. You will join a highly technical team and collaborate with product, UX/UI, and backend teams to deliver robust, reusable, and industry-best-practice-aligned solutions. **Responsibilities** * Develop modern, performant, and responsive interfaces using **React** and **Next.js** * Participate in front-end architecture decisions, proposing scalable technical solutions * Create reusable and well-documented components following best practices * Work with SSR, SSG, and advanced Next.js optimizations * Maintain clean, testable, and well-structured code * Collaborate with cross-functional teams (product, UX, backend) * Conduct code reviews and mentor junior and mid-level developers * Ensure high quality, security, and performance of applications * Participate in sprint planning and contribute technical estimates **Requirements** * Experience with **React.js** * Experience with **Next.js** (SSR, SSG, ISR, performance optimizations) * Experience with **JavaScript** and **TypeScript** * Experience with **CSS Modules, Styled Components, and Tailwind** * Consumption of REST or GraphQL APIs * Knowledge of testing (Jest, React Testing Library, or similar) * Experience with version control tools (Git) * Proficiency in best practices: Clean Code, SOLID, accessibility, performance **Nice-to-Haves (not required)** * Experience with **Liferay** (DXP, Portal, front-end modules) * Knowledge of containers (Docker) * Experience with CI/CD (GitHub Actions, GitLab CI, Jenkins, etc.) * Experience with micro frontends * Familiarity with Agile / Scrum * Cloud experience (AWS, GCP, or Azure) **Additional Information** * Contract type: PJ **Location****Contract Type****Work Model** São Paulo, SP, BR PJ Freelance Hybrid