This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Frontend Engineer (React) based in Brazil. This role offers the opportunity to build modern digital experiences for international clients through scalable and high-performance frontend solutions.You will work on complex web applications using React and modern frontend technologies while collaborating with talented engineering, design, and product teams.The position focuses on creating responsive, accessible, and optimized user experiences that deliver measurable business value.You will contribute to frontend architecture decisions, reusable component development, and continuous improvements in code quality and performance.The role is ideal for an experienced engineer who enjoys solving UI challenges and working in a collaborative, remote-first environment.You will have exposure to global projects, innovative technologies, and opportunities for continuous professional growth.Your expertise will directly influence the quality, scalability, and usability of products used by customers worldwide.