---
title: 'Software Engineer II (Backend, Core) at Whoop'
canonical: 'https://feeny.ai/job/software-engineer-ii-backend-core-whoop-boston-933xjzfvetbd'
type: 'job'
last_seen: '2026-09-09'
---

# Software Engineer II (Backend, Core) at Whoop

- **Company:** [Whoop](https://feeny.ai/companies/whoop)
- **Location:** Boston, MA
- **Compensation:** $125k–$215k
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-06-25
- **Last confirmed live:** 2026-09-09
- **Apply:** https://jobs.ashbyhq.com/whoop/cdf31e5e-d62a-4a20-9e11-2675ce645d5d/application

**Skills:** Java, RESTful APIs, PostgreSQL, AWS, React, System Design

> WHOOP is seeking a Software Engineer II to build and evolve foundational backend systems, APIs, and authentication services for its Enterprise platform. The role involves designing scalable solutions, collaborating with cross-functional teams, and ensuring system reliability and security in a high-ownership environm...

## Job 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.

## 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 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 and participates in E-verify https://www.e-verify.gov/ 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.

## About Whoop

## Company Overview
- **One-liner**: WHOOP is a human performance optimization platform that uses a wearable device and 24/7 monitoring to help members improve sleep, strain, recovery, and overall health.
- **Entity Type**: Private (funding stage not publicly available in provided sources)
- **Headquarters**: Boston, Massachusetts, USA
- **Founded**: 2012
- **Founders**: Will Ahmed

## Core Business
- **Primary industry**: Wearable health technology, human performance optimization
- **Target customers**: B2C (consumers, athletes) and B2B (professional sports teams, organizations)
- **Mission**: “To unlock human performance and Healthspan.” [whoop.com - About](https://www.whoop.com/us/en/about/)

## Products & Services
- **WHOOP 5.0 + Subscription**: A non-screen wrist-worn wearable with 14+ day battery life that continuously monitors sleep, strain, recovery, heart rate, heart rate variability, and 65+ biomarkers. The platform provides personalized coaching, blood pressure insights, women’s hormonal insights, VO₂ max, heart rate zones, and mental health tracking. Type: Hardware + SaaS subscription. [whoop.com - Homepage](https://www.whoop.com/us/en/)

## Market Standing
- **Valuation/Market Cap**: Not publicly available from provided sources
- **Key Metric**: Not publicly available (annual revenue not disclosed); estimated headcount of 500 employees [Built In Boston](https://www.builtinboston.com/company/whoop)
- **Notable Investors/Partners**: Not disclosed in provided sources
- **Growth Signals**: 500 total employees; hybrid workspace (4 days on-site per week); actively hiring across Engineering, AI/ML, Data & Analytics, Product, and Design; only 0.13% of applicants are hired, indicating high selectivity and strong talent demand. [whoop.com - Careers](https://www.whoop.com/us/en/careers/) | [Built In Boston](https://www.builtinboston.com/company/whoop)

## Competitive Advantages
- Proprietary 24/7 physiological monitoring with advanced sensor technology and an ultra-long battery life (14+ days)
- Deep scientific foundation – founded after reviewing over 500 medical papers
- Personalized coaching and insight delivery based on individual biometric data
- Strong brand recognition among elite athletes and mainstream consumers
- Privacy-first design with encrypted data storage [whoop.com - Homepage](https://www.whoop.com/us/en/)

## Strategic Focus
- Expanding health insights: introducing blood pressure monitoring, women’s hormonal health features, and heart health tracking
- Enhancing AI/ML capabilities (evident from many open AI/ML roles) [jobs.lever.co](https://jobs.lever.co/whoop)
- Deepening enterprise/B2B partnerships with sports organizations and research institutions
- Continuing to build out Healthspan and longevity features

## Why Work Here
- **Hybrid workspace** – employees are on-site 4 days a week in Boston’s “best office” [whoop.com - Careers](https://www.whoop.com/us/en/careers/)
- **Benefits** – flexible time off, above-market compensation, paid parental leave, health support [whoop.com - Careers](https://www.whoop.com/us/en/careers/)
- **Employee Resource Groups** – ADAPT (disability inclusion), BLACK@WHOOP, LGBTQ+ (WHOOP GOOP), Veterans and Military Personnel, Women of WHOOP, Women in Science and Engineering, WHOOP Parents [whoop.com - Careers](https://www.whoop.com/us/en/careers/)
- **High selectivity** – only 0.13% of applicants are hired, reflecting a rigorous, standards-driven culture [whoop.com - Careers](https://www.whoop.com/us/en/careers/)
- **Equal Opportunity Employer** – committed to diversity and inclusion in all employment decisions [whoop.com - Careers](https://www.whoop.com/us/en/careers/)

## Sources
1. [whoop.com - Careers](https://www.whoop.com/us/en/careers/)
2. [whoop.com - About](https://www.whoop.com/us/en/about/)
3. [whoop.com - Homepage](https://www.whoop.com/us/en/)
4. [Built In Boston - WHOOP Office Profile](https://www.builtinboston.com/company/whoop)
5. [jobs.lever.co - WHOOP Job Listings](https://jobs.lever.co/whoop)

## Other roles at Whoop

- [Manager, Governance Risk & Compliance (GRC)](https://feeny.ai/job/manager-governance-risk-compliance-grc-whoop-boston-dd393qqsb2jy) — Boston, MA
- [Senior Manager: Governance, Risk, & Compliance (GRC)](https://feeny.ai/job/senior-manager-governance-risk-compliance-grc-whoop-boston-9s2qk0pm8c6r) — Boston, MA
- [Manager, Immigration & Global Mobility](https://feeny.ai/job/manager-immigration-global-mobility-whoop-boston-cs3md62x0hqe) — Boston, MA
- [Director, Data Governance](https://feeny.ai/job/director-data-governance-whoop-boston-e4dt7r9pnbrq) — Boston, MA
- [Director, Enablement- Membership Services](https://feeny.ai/job/director-enablement-membership-services-whoop-boston-7tjnj7311jfc) — Boston, MA
- [Senior Product Manager, Sensing](https://feeny.ai/job/senior-product-manager-sensing-whoop-boston-74033x64kasj) — Boston, MA
- [Lead, Lifecycle Marketing Automation](https://feeny.ai/job/lead-lifecycle-marketing-automation-whoop-boston-ddez605e4h54) — Boston, MA
- [Staff Android Engineer, Connectivity](https://feeny.ai/job/staff-android-engineer-connectivity-whoop-boston-ay35t4j5nmfm) — Boston, MA
- [Vice President, Hardware Quality](https://feeny.ai/job/vice-president-hardware-quality-whoop-boston-qn8ptdmh7m06) — Boston, MA
- [Systems Engineer, Endpoint](https://feeny.ai/job/systems-engineer-endpoint-whoop-boston-6qjr7t75xvz8) — Boston, MA