This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Sr. Frontend Engineer (React) based in United States. This is a senior frontend engineering role focused on building sophisticated, high-scale digital products for recognized global brands and emerging ventures. You’ll take ownership of React applications from architecture and foundational patterns through delivery and continuous improvement. The role combines hands-on development with technical leadership, engineering best practices, and mentorship. You’ll collaborate closely with designers, product managers, engineers, and other stakeholders in a multidisciplinary environment. You’ll have the opportunity to influence technology choices, performance, scalability, code quality, and overall product experience. The environment encourages innovation, continuous learning, and thoughtful engineering while using modern web technologies. This is an opportunity to create products that people love while helping shape the technical direction of complex web experiences.