Lead React Developer

**This a Full Time position is hybrid São Paulo, Brazil** **working with US clients.** **We offer:** * Salary R$20,000 gross monthly * 3 days on site / 2 days at home * Vale Refeição / Alimentação R$ 992,00 * Plano de Saúde Bradesco ( Descontos Sujeito a Alteração) * Plano Odontológico Bradesco * Seguro de Vida * Auxílio Creche **Required Qualifications:** * Strong proficiency in **ReactJS** and its ecosystem (Hooks, Context API, Redux, etc.). * Excellent command of **JavaScript (ES6\+)** and **TypeScript** . * Solid understanding of **HTML5** , **CSS3** , **SASS/LESS** , and responsive design principles. * Experience with **frontend build tools** such as Webpack, Babel, Vite, or similar. * Familiarity with **RESTful APIs** , **GraphQL** , and **frontend integration** patterns. * Hands\-on experience with **unit testing frameworks** (Jest, React Testing Library, Cypress). * Strong understanding of **frontend performance optimization** techniques. * Excellent problem\-solving and leadership skills. * Effective communication skills in **English and Portuguese** (both written and verbal).