Full-Stack Platform Engineer: Design Systems & i18n

WHOOP; Boston (MA); On-site; USD 125,000 - 175,000; Full time

Job summary

WHOOP is seeking a Software Engineer II (Full Stack Web) to join our Client Platform team, focused on Design Systems and Translations. You’ll design and build shared frontend and backend systems enabling global experiences across web and mobile, from frontend components to localization services.

You’ll work across the stack and contribute to infrastructure powering design systems at scale. This role emphasizes cross‑stack collaboration, internationalization, and delivering accessible experiences

Qualifications

• 2–4 years of professional software engineering experience.
• Proficiency in web development using JavaScript/TypeScript, React, and Node.js.

Responsibilities

• Design, build, and maintain full stack systems that power WHOOP’s design system and translation infrastructure
• Develop and maintain reusable frontend components and shared libraries using modern frameworks (React/TypeScript)
• Implement and improve internationalization (i18n) support, including right-to-left (RTL) layouts and bidirectional text handling
• Partner with Design to build and scale a unified design system across web and mobile platforms
• Build and maintain backend services and APIs that support translation workflows, content delivery, and localization pipelines
• Ensure UI components are flexible, accessible, and adaptable to different languages, screen sizes, and regions
• Improve and maintain build and CI/CD systems (CircleCI, GitHub Actions) to support fast and reliable delivery
• Collaborate cross-functionally with Product, Design, Platform, and Localization teams to deliver scalable solutions
• Participate in code reviews and contribute to best practices around frontend architecture, localization, and design systems

Skills

JavaScript

TypeScript

React

Node.js

REST APIs

i18n

RTL support

CSS

PostgreSQL

CI/CD

Storybook

Design systems

Tools

CircleCI

GitHub Actions

Cloudflare

Vercel

CloudFront

Job description

WHOOP is seeking a Software Engineer II (Full Stack Web) to join our Client Platform team, focused on Design Systems and Translations. You’ll design and build shared frontend and backend systems enabling global experiences across web and mobile, from frontend components to localization services.

You’ll work across the stack and contribute to infrastructure powering design systems at scale. This role emphasizes cross‑stack collaboration, internationalization, and delivering accessible experiences