Frontend Engineer

<div class="content-intro"><p><strong>500M+ downloads. 80M+ monthly users. A decade of building – and we’re still accelerating.</strong></p> <p>Flo is the world’s #1 health & fitness app worldwide on a mission to build a better future for female health. Backed by a $200M investment led by General Atlantic, we became the first product of our kind to reach a $1B valuation in 2024 – and we’re not slowing down.</p> <p>With 7M paid subscribers and the highest-rated experience in the App Store’s health category, we’ve spent 10 years earning trust at scale. Now, we’re building the next generation of digital health – AI-powered, privacy-first, clinically backed – to help our users know their body better.</p> <p><strong>The job</strong></p></div><p>We’re looking for a <strong>Senior Frontend Engineer</strong> to help us build the next generation of Flo’s platform and user experiences.<br>You’ll work on the foundation that powers interactive surveys and dynamic content inside the Flo app — building SDKs, reusable components, and internal tooling that enable other product teams to deliver exceptional experiences quickly and reliably.</p> <p>Our frontend stack is based on <strong>React</strong>, <strong>TypeScript</strong>, and <strong>Next.js</strong>, with a strong focus on performance, maintainability, and testing.<br>We care deeply about quality: we use TypeScript for type safety, Jest and Playwright for automated testing, and continuously evolve our design system and UI Kit.</p> <p><strong>What you'll be doing:</strong></p> <ul> <li>Design, build, and maintain high-quality user-facing components and platform SDKs that enable survey and interactive experiences in the Flo ecosystem.</li> <li>Collaborate with product, design, and backend engineers to deliver flexible and scalable solutions.</li> <li>Contribute to Flo’s design system and shared UI libraries, ensuring consistency and reusability across products.</li> <li>Refactor and improve existing codebases for performance, reliability, and maintainability.</li> <li>Write clean, modular, well-documented code and advocate for engineering best practices.</li> <li>Actively participate in the frontend community at Flo, sharing ideas and driving improvements in architecture and development processes.</li> </ul> <p><strong>Your Experience</strong></p> <p><strong>Must have:</strong></p> <ul> <li>7+ years of experience building, shipping, and maintaining modern web applications.</li> <li>Expert-level knowledge of HTML, CSS, and JavaScript (ES6+).</li> <li>Deep experience with React and modern frontend tooling.</li> <li>Solid g