WHOOP is seeking a Senior Software Engineer (Full Stack) to develop end-to-end features for hundreds of thousands of members worldwide, focusing on improving the user experience and e-commerce initiatives. The role involves collaborating with product managers, designers, and engineers to build and iterate on high-impact projects. Responsibilities include designing, developing, and maintaining scalable web and backend infrastructure using React, Java, Postgres, and AWS, partnering with cross-functional teams, building reusable components, implementing observability tools, and contributing to a high-growth environment through technical mentorship and best practices.