Senior Software Engineer (Fullstack, AI Platform)

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. Our wearable technology and software platform provide personalized insights that help individuals optimize their health, fitness, and recovery. As a Senior Software Engineer on the AI team, you will play a key role in building and scaling the systems that power WHOOP AI’s internal and member-facing experiences. You will work across the stack to deliver high-quality features, contribute to agent orchestration system architecture, and collaborate with cross-functional partners to create seamless and impactful user experiences. This role is ideal for an engineer who is passionate about building reliable, scalable applications and thrives in a fast-paced, collaborative environment. Work in a cross-functional team alongside product managers, designers, and data scientists to deliver end-to-end features Design, develop, and maintain scalable front-end and back-end systems using modern frameworks and cloud technologies Design and build intuitive user interfaces and integrate them with robust backend APIs to deliver seamless member experiences Contribute to feature ideation, technical design, and implementation, translating business requirements into scalable solutions Write clean, maintainable, and well-tested code, following best practices for performance, security, and reliability Monitor, debug, and resolve production issues while continuously improving system performance and stability 2–5 years of professional software development experience Experience building and maintaining high-quality, performant web applications using Next.js, React, and Tailwind CSS Experience designing and developing APIs (RESTful services preferred) Experience building solutions leveraging Large Language Models Strong problem-solving skills and ability to break down complex problems into manageable solutions Ability to collaborate effectively with cross-functional teams in a fast-paced environment A growth mindset with a strong desire to learn, iterate, and improve continuously 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. The WHOOP compensation philosophy is designed to attract, motivate, and retain exceptional talent by offering competitive base salaries, meaningful equity, and consistent pay practices that reflect our mission and core values. At WHOOP, we view total compensation as the combination of base salary, equity, and benefits, with equity serving as a key differentiator that aligns our employees with the long-term success of the company and allows every member of our corporate team to own part of WHOOP and share in the company’s long-term growth and success. The U.S. base salary range for this full-time position is $150,000 - $215,000. Salary ranges are determined by role, level, and location. Within each range, individual pay is based on factors such as job-related skills, experience, performance, and relevant education or training. In addition to the bas