WHOOP

Software Engineer II (Backend, Core)

WHOOP • $110K — $130K *
Information Technology
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • 2+ years of professional software engineering experience, primarily in backend development
  • Experience building and owning production backend systems and RESTful APIs, preferably in Java
  • Familiarity with authentication and identity management concepts
  • Proficient in using relational databases, particularly PostgreSQL
  • Experience in cloud environments, specifically AWS
  • Ability to contribute to web applications, utilizing technologies like React in addition to backend strengths
  • Strong system design skills and experience in creating scalable and maintainable software
  • Effective in fast-paced and ambiguous settings with minimal structured processes

Responsibilities

  • Own and evolve core systems for WHOOP Enterprise, focusing on APIs and account management
  • Design, build, and maintain backend services to support enterprise use cases
  • Collaborate with design and engineering teams to create solutions from ambiguous product requirements
  • Define and influence technical direction and system architecture for the platform
  • Build secure and reliable systems tailored for enterprise customer needs
  • Maintain observability and operational practices for system stability
  • Deliver high-quality, tested code adhering to software design best practices
  • Establish engineering foundations for team growth including documentation and mentorship

Benefits

  • Generous equity package that allows employees to share in the company's long-term success
  • Comprehensive benefits to enhance overall compensation
  • Opportunity for personal and professional growth within a diverse work environment
  • Support for relocation to the Boston office if necessary
  • Encouragement to apply even if not meeting every qualification, valuing character alongside experience
Full Job Description
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.

Qualifications
  • 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.

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.

About WHOOP

WHOOP is a wearable technology company that specializes in fitness tracking. The company was founded in 2012 and is based in Boston, Massachusetts. WHOOP's flagship product is a wristband that tracks various metrics related to fitness and health, such as heart rate variability, sleep quality, and recovery time. The company also offers a subscription service that provides personalized insights and recommendations based on the data collected by the wristband. WHOOP has raised over $200 million in funding and has partnerships with several professional sports leagues and teams.
Learn more about WHOOP
Size
500 employees
Industry
Founded
2011

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