Senior Software Engineer (Backend, Growth)

• The Growth Team at WHOOP is a fast-paced, experimentation-driven group focused on driving user acquisition, activation, and retention
• We take a data-driven approach to everything we do, frequently measuring the performance of our features and iterating based on those results
• As a Senior Software Engineer, you will play a key role in building backend services that directly impact our business metrics and accelerate member growth
• You’ll work cross-functionally to deliver high-leverage features and contribute to system architecture decisions, helping WHOOP scale to millions of members
• Design and build scalable and reliable backend services to support growth experiments, e-commerce flows, and member engagement initiatives
• Collaborate closely with Product, Design, and cross-functional Engineering teams to define and deliver impactful features
• Maintain and optimize APIs and infrastructure using Java, Kafka, Postgres, and AWS technologies
• Take ownership of end-to-end development, from breaking down requirements to implementation, testing, deployment, and monitoring
• Mentor junior engineers and contribute to the growth of engineering best practices across the team

Benefits

• Flexible Vacation: WHOOP has a flexible vacation policy that allows you to unwind, laptop-free, when you need it most.
• Focus on Family: We offer 18 weeks paid parental leave, plus an additional 2 weeks to gradually return to work.
• Get Invested: In addition to a competitive base salary and 401k, you’re eligible to receive stock options to share in the future of WHOOP.
• WHOOP +1: Everyone on the team gets a complimentary WHOOP membership—plus another membership to share with a loved one.
• Health Matters: Our competitive benefits package covers medical, dental, and vision, in addition to mental health services, life and disability insurance, and more.
• Find Your Fit: Full-time employees get $500 a year to spend on wellness in whatever way they see fit, from fitness classes and memberships, to recovery services.
• It Pays to Sleep: Our Sleep Performance Program incentivizes employees to get more sleep. Log an average sleep performance of 85% or higher for the month and get a $100 bonus.
• Location, Location, Location: You can’t beat the views from the rooftop of One Kenmore Square. Feel inspired daily as you work, enjoy free snacks and coffee, and collaborate in the heart of Boston.- Proven collaboration skills across engineering, product, and data teams
• Ability to thrive in a fast-paced, iterative environment focused on growth and experimentation
• Professional experience developing large-scale backend systems in a production environment
• Strong testing practices and clear documentation habits
• Deep proficiency in building and maintaining RESTful APIs and working with relational databases (e.g., Postgres)
• Bonus: Experience building A/B testing infrastructure or growth-focused engineering features
• Experience with event-driven architectures and tools like Kafka or SQS
• A growth mindset and excitement for tackling ambiguous challenges