Software Engineer II (Full Stack, Platform)

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

Requirements

• 2-4 years of professional software engineering experience
• Proficiency in web development using JavaScript/TypeScript, React, and Node.js
• Experience building and integrating RESTful APIs
• Familiarity with frontend architecture and building reusable UI components or design systems
• Experience with design implementation, taking mockups in tools like Figma and making them reality
• Understanding of internationalization (i18n) and localization best practices
• Familiarity with CSS, responsive design, and modern layout techniques
• Experience with relational databases such as PostgreSQL or MySQL
• Experience working with build systems and CI/CD tools (CircleCI, GitHub Actions)
• Strong communication skills and ability to collaborate with technical and non-technical stakeholders
• Experience implementing RTL support using CSS logical properties and direction-based styling
• Familiarity with bidirectional (BiDi) text handling and localization edge cases
• Experience with design system tooling (e.g., Storybook) or cross-platform component libraries
• Exposure to translation platforms or localization pipelines
• Exposure to design tokens, managing tokens for color modes and multiple themes
• Backend experience in languages like Java, Python, or C#
• Familiarity with cloud delivery platforms (Cloudflare, Vercel, CloudFront)
• Experience with accessibility standards (WCAG) and inclusive design
• Learn more about our Software Org and how to be successful in your engineering career at WHOOP via our Career Framework .
• This role is based in the WHOOP office located in Boston, MA. The successful candidate must be prepared to relocate if necessary to work out of the Boston, MA office.
• The WHOOP compensation philosophy is designed to attract, motivate, and retain exceptional talent by offering competitive base salaries, meaningful equity, and consistent pay practices that reflect our mission and core values.
• The U.S. base salary range for this full-time position is $125,000 - $175,000. Salary ranges are determined by role, level, and location. Within each range, individual pay is based on factors such as job-related skills, experience, performance, and relevant education or training.
• In addition to the base salary, the successful candidate will also receive benefits and a generous equity package.

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