Software Engineer II (Backend, AI Platform)

Software Engineer II (Backend, AI Platform) At WHOOP, we're on a mission to unlock human performance and healthspan. WHOOP empowers members (Olympians, Professional Athletes, Fitness Enthusiasts, etc) to perform at a higher level through a deeper understanding of their bodies and daily lives. We are looking to add highly motivated and skilled engineers to our team to help us take our proven system to new heights. The AI Platform team at WHOOP is responsible for building the foundation that enables scalable, responsible, and accessible use of Generative AI across our products. We focus on developing reusable infrastructure, services, and tools that empower product and software teams to experiment with, integrate, and ship GenAI-powered features efficiently and safely. By abstracting the complexities of large language models (LLMs) and enabling deliverability of personalized member insights, our platform accelerates innovation and ensures consistent, high-quality user experiences. As a Software Engineer II on the AI Platform team, you will play a key role in designing and scaling the systems that serve as the backbone of WHOOP’s Generative AI capabilities. You’ll build robust, modular services and developer-friendly tools that simplify working with GenAI models across the organization. This role combines a platform mindset with engineering excellence, helping WHOOP unlock the full potential of Generative AI—across the Core product, coaching, insights, and beyond. 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: - - Help execute WHOOP's vision to build and scale the use of Generative across our Core product - Develop backend features and services, leveraging Java, AWS, and PostgreSQL to deliver scalable and reliable software solutions. - Collaborate with cross-functional teams—including Product, Design, and Data Science—to gather technical requirements and deliver impactful infrastructure and tools - Design abstraction layers that empowers Product and Software teams to leverage Generative AI in the WHOOP product. - Consistently deliver high-quality code, adhering to best practices in software design and development. - Develop and maintain observability and monitoring systems to ensure the stability and reliability of deployed features. - Mentor and support junior engineers, fostering a culture of collaboration and continuous improvement. QUALIFICATIONS: - - Experience in backend development, working on large-scale software systems. - Experience building applications on top of Large Language Models. - Expertise in API design and development (preferably with Java). - Experience in relational database design and development (SQL). - Experience with scalable system design and performance optimization. - Strong independent problem-solving skills and the ability to work effectively in a fast-paced, collaborative environment. - Excellent communication skills and a commitment to delivering high-quality work. 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 ... (truncated, view full listing at source)