Software Engineer I (Frontend, Growth)

WHOOP; Boston (MA); On-site; USD 90,000 - 120,000; Full time

Job summary

WHOOP is seeking a frontend software engineer to contribute to high-quality web experiences. You will build responsive UIs with React/TypeScript, work with Product, Design, and Analytics to run experiments, and iterate based on data.

You will write clean, tested code, integrate with RESTful APIs, and help improve performance, accessibility, and cross-browser compatibility. Collaborate with cross-functional teams to deliver member value.

Qualifications

• Frontend development experience with modern JS/TS and React.
• Strong understanding of HTML, CSS, and responsive design.
• Experience integrating frontend with RESTful APIs.
• Git version control experience.
• Strong problem-solving and collaborative communication.
• Bonus: experience with A/B testing frameworks.
• Fast-paced, experiment-driven environment.
• Clear communication with cross-functional partners.

Responsibilities

• Develop and maintain responsive frontend applications powering WHOOP’s web experiences
• Collaborate with Product, Design, and Analytics to run experiments and iterate on results
• Write clean, maintainable, tested code using React and modern JS
• Integrate frontend with RESTful APIs and backend services
• Break down features into tasks, identify risks, iterate to deliver value
• Monitor performance, accessibility, and usability across devices/browsers
• Participate in code reviews and technical discussions

Skills

Frontend development

React

TypeScript

REST APIs

Git

Responsive design

Testing

Cross-functional collaboration

A/B testing

Tools

React

TypeScript

RESTful APIs

Job description

RESPONSIBILITIES:

• Contribute to the development and maintenance of responsive, high-quality frontend applications that power WHOOP’s web experiences

• Partner with Product, Design, and Analytics to implement experiments (A/B tests) and iterate quickly based on measurable results

• Write clean, maintainable, and well-tested code using modern JavaScript frameworks (e.g., React) and industry best practices

• Integrate frontend applications with RESTful APIs and backend services to deliver seamless, performant user experiences

• Break down feature requirements into actionable tasks, identify risks early, and iterate quickly to deliver value to members

• Monitor and improve application performance, accessibility, and usability across devices and browsers

• Participate in code reviews and technical discussions, proactively seeking feedback and continuously improving your craft

QUALIFICATIONS:

• Professional experience in frontend software development (internship, co-op, or academic project experience acceptable)

• Experience building web applications using modern JavaScript/TypeScript and frameworks such as React

• Understanding of core web technologies including HTML, CSS, and responsive design principles

• Familiarity with integrating frontend applications with RESTful APIs

• Experience using version control systems such as Git

• Strong problem-solving skills and an eagerness to learn in a fast-paced, experiment-driven environment

• Clear communication skills and a collaborative mindset when working with cross-functional partners

• Bonus: Experience with A/B testing frameworks or growth-focused engineering initiatives