> Markdown version of [/jobs/ext/2718692-software-engineer-ii](https://www.wearedevelopers.com/jobs/ext/2718692-software-engineer-ii). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Software Engineer II - **Company:** Whoop, Inc. - **Location:** Boston, MA, United States - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Artificial Intelligence, Code Review, Relational Databases, Distributed Systems, Mobile Application Software, PostgreSQL, Performance Tuning, Reliability of Systems, Backend, Apache Kafka, Restful APIs, Amazon Simple Queue Service (SQS) - **Published:** September 4, 2026 - **Apply:** https://startup.jobs/software-engineer-ii-backend-core-whoop-com-9020191 ## About the Role * Demonstrated ability to independently deliver production-quality software while collaborating effectively across engineering, product, and design. * Strong proficiency with backend development, including Java, RESTful APIs, and relational databases such as Postgres. * Experience working with cloud platforms and asynchronous systems such as Kafka or SQS. * Experience designing, testing, and maintaining reliable, scalable backend services. * Understanding of distributed systems, observability, and performance optimization. * Strong collaboration and communication skills with cross-functional partners. * Growth mindset with a desire to learn, iterate, and continuously improve. * Enthusiasm in leveraging AI tools while maintaining high standards for quality and engineering excellence. * Bonus: Experience contributing to mobile applications or shared platform services. ## Description 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, sleep, and recovery. As a Software Engineer II on the Core team, you will build the foundational services that power the WHOOP App and develop features that empower members to optimize performance and longevity. You will play a critical role in building and scaling the foundational systems that power the WHOOP member experience for fitness, sleep, strain, recovery, and integrations. You will partner closely with other engineers, product management, design, data science, and performance science to shape and build the polished member-facing experiences for these features. Responsibilities * Own the design, implementation, and delivery of backend services that power member-facing experiences, collaborating with cross-functional partners to deliver scalable, reliable solutions. * Contribute to technical planning by translating product requirements into actionable engineering work, identifying risks and dependencies, and delivering iteratively. * Improve system reliability, performance, and observability through testing, monitoring, and continuous refinement. * Contribute to shared engineering foundations through code reviews, documentation, and technical discussions that improve team effectiveness. * Support other engineers through collaboration, knowledge sharing, and constructive feedback. ## Related Videos - [Coffee with Developers - Adam Wiggins](https://www.wearedevelopers.com/videos/919-coffee-with-developers-adam-wiggins) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Optimizing Discovery: PostgreSQL's Role in Transforming GetYourGuide's Search](https://www.wearedevelopers.com/videos/1647-optimizing-discovery-postgresql-s-role-in-transforming-getyourguide-s-search) - [Are Code Reviews Worth It? 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