At WHOOP, we're on a mission to unlock human performance and healthspan. WHOOP empowers members to perform at a higher level through a deeper understanding of their bodies and daily lives. We are looking for a Senior Software Engineer (Full Stack) to join our growing team. In this role, you'll architect and build end-to-end features that improve the experience for hundreds of thousands of members worldwide. You'll collaborate closely with product managers, designers, and engineers to shape high-impact projects across both frontend and backend systems. As a Senior Software Engineer, you’ll help deliver features that directly impact our e-commerce initiatives. You’ll collaborate closely with cross-functional teammates to build, measure, and rapidly iterate on projects that drive business metrics and member growth. Responsibilities • Design, develop, and maintain scalable and performant features across our web and backend infrastructure using technologies such as React, Java, Postgres, and AWS • Partner cross-functionally to define product requirements and translate them into technical solutions • Develop reusable and modular components to support rapid product iteration and experimentation • Implement observability and monitoring tools to ensure high availability and system reliability • Work collaboratively in a high growth environment with a product minded approach • Lead by example through technical mentorship, code reviews, and best practices in software development Qualifications • 4+ years of professional experience working on large scale software systems • Expertise developing web applications using frameworks like React • Experience in API design and development (Java preferred) • Experience in relational database design and development (SQL) • Strong skills translating design specifications into fully functional applications • Experience developing large scale, production-quality web applications • Thrives with autonomy, with a positive attitude and ownership mentality • Strong problem-solving skills and a pragmatic, data-informed approach to technical decisions • Passion for fitness, wellness, and helping others improve their health through technology Learn more about our Software Org and how to be successful in your engineering career at WHOOP via our Career Framework . This role is based in the WHOOP office located in Boston, MA. The successful candidate must be prepared to relocate if necessary to work out of the Boston, MA office. Interested in the role, but don’t meet every qualification? We encourage you to still apply! At WHOOP, we believe there is much more to a candidate than what is written on paper, and we value character as much as experience. As we continue to build a diverse and inclusive environment, we encourage anyone who is interested in this role to apply. WHOOP is an Equal Opportunity Employer and participates in E-verify to determine employment eligibility. It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.