Full-Stack Engineer: Design Systems & i18n Platform

WHOOP; Boston (MA); On-site; USD 110,000 - 160,000; Full time

Benefits offered by this job

Flexible vacation

Paid parental leave (18 weeks)

Stock options

WHOOP membership for you and a loved 1

Medical, dental, vision insurance

Wellness stipend

Sleep bonus program

Job summary

WHOOP is seeking a Software Engineer II (Full Stack Web) to join the Client Platform team in Boston. You will design and build shared frontend and backend systems to deliver consistent, high-quality experiences across web and mobile surfaces, and you will contribute to design systems and translation infrastructure.

You’ll work across the stack—from frontend component libraries to backend localization services—and collaborate with cross-functional teams to enable global expansion with accessible,

Qualifications

• 2–4 years of professional software engineering experience.
• Experience designing and building frontend and backend systems for web and mobile.
• Strong experience with internationalization workflows and localization pipelines.
• Familiarity with accessibility standards (WCAG) and inclusive design.
• Experience building and maintaining design systems and reusable UI components.

Responsibilities

• Design, build, and maintain full stack systems powering design systems and translation infrastructure.
• Develop and maintain reusable frontend components and shared libraries (React/TypeScript).
• Implement and improve i18n support, including RTL layouts and bidirectional text handling.
• Build backend services and APIs supporting translation workflows and localization pipelines.
• Ensure UI components are accessible, responsive, and adaptable to languages, regions, and devices.
• Improve and maintain build and CI/CD systems (CircleCI, GitHub Actions).
• Collaborate with Product, Design, Platform, and Localization teams to deliver scalable solutions.

Skills

Frontend development

Backend development

Localization / i18n

Design systems

Accessibility (WCAG)

Collaboration

RESTful APIs

BiDi text handling

CI/CD

React/TypeScript

Tools

React

TypeScript

Node.js

PostgreSQL

MySQL

CircleCI

GitHub Actions

Storybook

Figma

Cloudflare

Vercel

CloudFront

Job description

WHOOP is seeking a Software Engineer II (Full Stack Web) to join the Client Platform team in Boston. You will design and build shared frontend and backend systems to deliver consistent, high-quality experiences across web and mobile surfaces, and you will contribute to design systems and translation infrastructure.

You’ll work across the stack—from frontend component libraries to backend localization services—and collaborate with cross-functional teams to enable global expansion with accessible,