An Industry Defining Company

Karoo is a venture-backed startup, prior to Series A, on a mission to transform cardiovascular care. Our platform is designed to empower large provider groups and health systems to succeed in value-based care contracts with payers by improving patient outcomes and reducing cost of care through better coordination, analytics, and disease management. While our initial focus is cardiology, we are building a scalable operating system for managing complex conditions across the healthcare spectrum.

This is a rare opportunity to join a mission-driven founding team at a pivotal stage and help define the future of healthcare technology, with the power to improve the lives of patients with cardiovascular disease, the number one cause of death in America today.

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Overview**

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Location:** Denver preferred, or remote, U.S.-based

Type: Full-time technical leadership role

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The Role**

We’re looking for a Lead Frontend Engineer to develop and own the frontend architecture, working closely with product and backend teams to create seamless, scalable, and visually compelling user experiences. You will be responsible for selecting the right technologies, implementing best practices, and building intuitive web applications from the ground up. Initially, this is an individual contributor (IC) role, but as we scale, you’ll have the opportunity to hire and lead a frontend engineering team.

When applying, please include a description of why you’re interested in this role.

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What You'll Do**

• Architect, develop, and maintain modern, scalable web applications
• Work closely with backend engineers to integrate APIs and ensure seamless user experiences
• Optimize applications for performance, accessibility, and cross-browser compatibility
• Implement best practices for frontend development, including testing, CI/CD, and code reviews
• Select and maintain the technology stack for frontend development (React, Vue, Angular, etc.)
• Establish and maintain design systems and component libraries
• Collaborate with designers and product managers to create engaging user interfaces
• Ensure security best practices in frontend applications, including authentication and data protection
• Define the frontend engineering roadmap and contribute to hiring and mentoring future team members

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What We're Looking For**

• 5+ years of experience in frontend development, ideally in a startup or fast-paced environment
• Strong proficiency in JavaScript/TypeScript and modern frontend frameworks (React, Vue, Angular, or similar)
• Experience building and optimizing single-page applications (SPAs) with high performance and scalability
• Deep understanding of state management solutions (Redux, MobX, Vuex, etc.)
• Proficiency in HTML, CSS, and CSS-in-JS solutions (Styled Components, Emotion, Tailwind CSS, etc.)
• Experience with component-driven development and building reusable UI components
• Familiarity with frontend build tools and bundlers (Webpack, Vite, Rollup, etc.)
• Strong understanding of RESTful and GraphQL API integrations
• Hands-on experience with automated testing frameworks (Jest, Cypress, Testing Library, etc.)
• Ability to work independently and make key technical decisions

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Nice to Have**

• Experience with server-side rendering (Next.js, Nuxt.js) and static site generation
• Familiarity with WebSockets, real-time data processing, and PWA development
• Knowledge of UX/UI best practices and usability principles
• Experience with frontend performance monitoring and analytics
• Previous experience in hiring and leading frontend teams

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Why Join Us**

• Competitive salary and equity in an early-stage startup
• Opportunity to define the frontend technology stack and build a high-impact product
• Possibly fully remote work environment with flexible hours
• Health benefits, learning stipends, and professional development support
• A collaborative and transparent company culture that values innovation and ownership