Senior Software Engineer (Frontend, Growth)

Whoop
Boston
Workplace: OnsiteFull timeUSD 150,000 - 215,000 annuallyFunction: Software EngineeringExperience: 5+ yearsSkills: ["Mentoring","Cross-functional communication","Written communication","Verbal communication","Async-first collaboration"]

Own the technical direction of WHOOP’s Growth web experiences, driving improvements to join flow, checkout, and shop. Lead end-to-end cross-functional projects, author architecture plans, and design rigorous A/B tests with strong instrumentation. Build production-ready frontend code using TypeScript, React, and Next.js, integrating with edge infrastructure and Stripe-powered commerce systems. Ensure performance, accessibility, reliability, and mentor engineers through reviews, pairing, and incident response.

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FursaFursa
Whoop
Whoop
3 months ago

Senior Software Engineer (Frontend, Growth)

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Source: Company careers pageValidated by: Fursa AI
Last checked: 13 hours agoStatus: Live

Job Summary

Own the technical direction of WHOOP’s Growth web experiences, driving improvements to join flow, checkout, and shop. Lead end-to-end cross-functional projects, author architecture plans, and design rigorous A/B tests with strong instrumentation. Build production-ready frontend code using TypeScript, React, and Next.js, integrating with edge infrastructure and Stripe-powered commerce systems. Ensure performance, accessibility, reliability, and mentor engineers through reviews, pairing, and incident response.
Location: Boston
Workplace: Onsite
Employment Type: Full time
Job Function: Software Engineering
Seniority: Mid level

Key Responsibilities

  • •Own the architecture and technical direction of WHOOP’s web experiences, including the Next.js join flow, Cloudflare Workers edge infrastructure, and Stripe-powered checkout.
  • •Lead end-to-end cross-functional projects from brainstorm and technical planning through implementation, QA, rollout, and post-launch analysis.
  • •Design and execute A/B tests with proper instrumentation and measurement, iterating based on impact to North Star metrics.
  • •Drive frontend performance, accessibility, and reliability across devices and browsers, establishing standards and monitoring.
  • •Write clean, well-tested TypeScript/React/Next.js code and integrate deeply with backend services and ecommerce/payment systems; mentor engineers and lead incident response/postmortems.

Pay and Benefits

Salary: USD 150,000 - 215,000 annually
Equity and Bonus:Equity

Key Requirements

  • •5+ years of professional frontend software engineering experience with deep expertise in TypeScript, React, and modern web frameworks (Next.js strongly preferred).
  • •Own 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.
  • •Integrate frontend applications with payment systems (Stripe preferred), RESTful APIs, and third-party platforms.
  • •Design and run meaningful A/B tests, using data-informed decisions in a growth or product engineering context.
Experience:5+ yearsGrowthProduct engineeringEcommerce
Skills:MentoringCross-functional communicationWritten communicationVerbal communicationAsync-first collaboration
Tech Stack:TypeScriptReactNext.jsCloudflare WorkersStripeCommerceToolsREST APIsA/B testingDatadogSentryAmplitude

Company Brief

Whoop
Whoop designs and sells a subscription-based wearable fitness tracker and analytics platform that monitors recovery, strain, and sleep to optimize athletic performance and daily health for consumers and professional athletes.
Industry: Wearables
Company Size: Large (251 to 1,000 employees)
Growth: Scaleup
Valuation: Unicorn (USD 1B+)
Funding: Series E+
Headquarters: Boston, United States
Founded: 2012
WebsiteLinkedIn