Senior Frontend Engineer - Contractor

<div> <p data-start="0" data-end="184"><strong>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 - Contractor based in Brazil.</strong></p> <p data-start="186" data-end="1098">You will join a product-driven engineering team focused on building modern, high-performance web applications that deliver seamless digital experiences at scale. In this role, you will take ownership of crafting responsive and intuitive user interfaces using React, working closely with product managers, designers, and backend engineers to turn ideas into production-ready features. You will contribute to shaping frontend architecture while ensuring scalability, performance, and maintainability across applications. The environment is highly collaborative, fast-paced, and quality-oriented, with a strong emphasis on clean code and user experience. Beyond feature delivery, you will play a key role in improving frontend standards, optimizing performance, and mentoring junior engineers. This is an opportunity to have real product impact while working with modern technologies in a globally distributed team.</p> </div>