Software Engineer II (Backend, Growth)
At WHOOP, we're on a mission to unlock and inspire performance for life. WHOOP empowers members to perform at a higher level through a deeper understanding of their bodies and daily lives.
The Growth team is responsible for accelerating member acquisition, activation, engagement, and retention through rapid experimentation and thoughtful product development. As a Software Engineer II (Backend), you’ll contribute directly to building and optimizing backend systems that power WHOOP’s growth initiatives. You’ll deliver high-impact features that directly influence member and business outcomes. You’ll work closely with Product, Design, and fellow engineers in a fast-paced, experiment-driven environment where iteration, measurement, and continuous improvement are core to how we build.
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.
About WHOOP
WHOOP is a performance optimization system that tracks athlete recovery, training, and sleeping hours to help boost performance.
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