Senior Software Engineer (Frontend Growth)

RESPONSIBILITES:

• Own the architecture and technical direction of WHOOP's web experiences including our Next.js-based join flow Cloudflare Workers edge infrastructure and Stripe-powered checkout
• Lead cross-functional projects end-to-end from brainstorm and technical planning through implementation QA rollout and post-launch analysis partnering closely with Product Design and Analytics
• Design and execute experiments (A/B tests) with rigor ensuring proper instrumentation measurement and iteration based on impact to North Star metrics
• Drive frontend performance accessibility and reliability across devices and browsers establishing standards and monitoring that the team can build on
• Write clean well-tested production-quality code in TypeScript/React/Next.js and integrate deeply with backend services payment systems (Stripe) and ecommerce platforms (CommerceTools)
• Author and review technical plans identify architectural tradeoffs and make sound judgment calls that balance speed with long-term maintainability
• Mentor and develop other engineers through code review pairing and technical guidance raising the bar for quality and velocity across the web surface
• Participate in on-call rotations and incident response; lead postmortems and drive improvements that prevent recurrence
• Contribute to Growth's engineering culture through documentation process improvements and knowledge sharing

QUALIFICATIONS:

• 5+ years of professional experience in frontend software engineering with deep expertise inTypeScript React and modern web frameworks (Next.js strongly preferred)
• Track record of owning and delivering complex cross-functional web projects from technical design through production rollout
• Strong understanding of web performance optimization edge computing (e.g. Cloudflare Workers) and responsive design at scale
• Experience integrating frontend applications with payment systems (Stripe preferred) RESTful APIs and third-party platforms
• Demonstrated ability to design and run meaningful A/B tests and make data-informed decisions in a growth or product engineering context
• Experience with observability and monitoring tools (e.g. Datadog Sentry Amplitude) to proactively identify and resolve production issues
• Proven ability to mentor engineers lead technical discussions and influence engineering practices across a team
• Excellent written and verbal communication skills; comfortable operating in an async-first cross-functional environment
• Bonus: Experience with ecommerce platforms (CommerceTools) feature flag / experimentation infrastructure or subscription/membership business models

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.


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