Whoop

Software Engineer II (Backend, Core)

$125K–$175K

Boston, MA · On-site · Full-time · Posted Jun 25, 2026

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About the job

Build and scale backend services and features that power WHOOP’s member-facing app experiences for fitness, sleep, strain, recovery, and integrations.

What you'll do

Design, implement, and deliver reliable, scalable backend services with cross-functional partners.
Translate product requirements into engineering plans, identify risks and dependencies, and deliver iteratively.
Improve reliability, performance, and observability; contribute through reviews, documentation, and support for teammates.

What they ask for

Demonstrated ability to independently deliver production-quality software and collaborate across engineering, product, and design.
Strong backend development proficiency, including Java, RESTful APIs, and relational databases such as Postgres.
Experience 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.

Nice to have

Experience contributing to mobile applications or shared platform services.

Pay

$125K – $175K (base salary)

Tools

Java, RESTful APIs, Postgres, Kafka, SQS

AI focus

Use AI tools while maintaining high standards for quality and engineering excellence.

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