Software Engineer II (Backend, Growth)

Software Engineer II (Backend, Growth) 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 monitors vital physiological metrics to offer personalized insights that enhance fitness, health, and recovery. The Growth Team at WHOOP is a fast-paced, experimentation-driven group focused on driving user acquisition, activation, and retention. We take a data-driven approach to everything we do, meaning we frequently measure the performance of our features and make iterations based on those results. As a Software Engineer II on this team, you’ll help deliver features that directly impact business metrics and member growth. You’ll collaborate closely with cross-functional teammates to build, measure, and iterate on high-leverage mobile experiences. This posting is for an immediate new hire to our team. For those graduating in the fall of 2026 seeking entry level roles, we kindly ask that you check out this New Grad Opportunities https://jobs.lever.co/whoop/ae991d44-dc91-4b40-9ef9-28977fbd1f76 job posting instead to be considered for roles opening at that time. Thank you. RESPONSIBILITIES: - - Collaborate closely with product managers, designers, and fellow engineers to develop scalable and reliable backend services. - Build, maintain, and optimize APIs and infrastructure supporting our acquisition funnels, e-commerce experiences, and membership growth experiments. - Write well-tested, maintainable code using technologies such as Java, Kafka, Postgres, and AWS. - Break down feature requirements into actionable tasks, prioritize work, and consistently deliver on sprint commitments. - Contribute to backend architecture discussions and implementation of scalable, high-availability services that support millions of users. - Work with data scientists and analytics engineers to support experimentation and measure performance. - Participate in code reviews and collaborate on best practices with your engineering peers. QUALIFICATIONS: - - Professional backend engineering experience in a production environment. - Proficiency in building APIs and working with relational databases (e.g., RESTful APIs, Postgres). - Experience with event-driven systems and asynchronous processing tools such as Kafka or SQS. - Skilled in writing comprehensive tests and clear documentation. - Demonstrated ability to work cross-functionally and communicate clearly with technical and non-technical stakeholders. - A growth mindset and eagerness to learn from feedback and new challenges. - Bonus: Experience with A/B testing frameworks or growth-focused engineering initiatives. Learn more about our Software Org and how to be successful in your engineering career at WHOOP via our Career Framework https://engineering.prod.whoop.com/careerframework. 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 https://www.e-verify.gov/ 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 re ... (truncated, view full listing at source)