WHOOP

Software Engineer II (Backend AI Platform)

Reposted 16 Hours Ago

Easy Apply

Boston MA USA

Hybrid

125K-175K Annually

Mid level

Fitness • Hardware • Healthtech • Sports • Wearables

Power your performance with 24/7 data

The Role

Design and scale backend services and developer tools for WHOOP's Generative AI platform using Java AWS and PostgreSQL; build APIs observability and abstractions to enable safe scalable LLM-powered features; collaborate cross-functionally and mentor junior engineers.

Summary Generated by Built In

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 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.

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 $125000 - $175000. 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 base salary the successful candidate will also receive benefits and a generous equity package.

These ranges may be modified in the future to reflect evolving market conditions and organizational needs. While most offers will typically fall toward the starting point of the range total compensation will depend on the candidate’s specific qualifications expertise and alignment with the role’s requirements.

Top Skills

Api Design

AWS

Generative Ai

Java

Large Language Models (Llms)

Observability/Monitoring

Postgres

SQL

What the Team is Saying

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The Company

HQ: Boston MA

500 Employees

Year Founded: 2012

What We Do

At WHOOP we’re on a mission to unlock human performance. WHOOP empowers members to perform at a higher level through a deeper understanding of their bodies and daily lives. Our wearable device and performance optimization platform has been adopted by many of the world's greatest athletes and consumers alike.

Why Work With Us

At WHOOP we’re focused on building an inclusive and equitable team with a strong sense of belonging for everyone—increasing representation in every way as our team grows. We believe that our differences are our source of strength—so much so it’s one of our core values. 