Senior Frontend Engineer I - eCommerce

Join a mission-driven healthcare technology team working to make proactive healthcare more accessible through innovative digital experiences. In this role, you will build and optimize the eCommerce booking platform that enables customers to explore services, select clinics, complete payments, and schedule appointments. You will lead complex frontend features using React, Next.js, and TypeScript, with a direct impact on conversion, revenue, performance, and customer trust. Working closely with Product, Design, Marketing, and Backend Engineering, you will shape solutions from early discovery through production launch. You will also contribute to frontend architecture, accessibility, analytics, and experimentation while exploring AI-assisted development workflows. This is an opportunity for a hands-on engineer who thrives in a fast-moving environment, takes ownership of outcomes, and wants to make a meaningful impact on healthcare.

• Typically 4 or more years of professional frontend engineering experience, including at least 3 years building production applications with React and TypeScript.

• Strong experience with Next.js or a comparable React framework, including routing, server-side rendering, and the tradeoffs between server and client rendering.

• Solid understanding of browser fundamentals, including semantic HTML, modern CSS, responsive layouts, the JavaScript event loop, networking, caching, and browser rendering.

• Experience with modern data-fetching and state-management approaches such as TanStack Query, Zustand, Redux, or equivalent tools.

• Experience building complex, validated, multi-step forms and transactional user journeys.

• Strong testing practices across unit, component, and end-to-end testing, using tools such as Vitest or Jest, Testing Library, and Playwright or Cypress.

• Experience developing checkout, payment, or other transactional flows where accuracy, security, and reliability are essential.

• Working knowledge of WCAG 2.1 AA accessibility standards and web performance optimization, including Core Web Vitals.

• Familiarity with frontend monitoring and product analytics tools such as Datadog RUM, Sentry, PostHog, or Google Analytics.

• Hands-on experience with modern CI/CD practices and cloud-hosting environments, such as GitHub Actions and AWS.

• Demonstrated ability to lead complex features from initial design through implementation, deployment, and ongoing production support.

• A proactive, adaptable mindset, with the ability to navigate ambiguity, seek input when needed, and balance delivery speed with engineering quality.

• Excellent communication and collaboration skills across engineering, design, product, and business teams.

• Additional experience that is a plus: Stripe.js and payment integrations, including buy-now-pay-later providers such as Affirm; headless commerce platforms such as commercetools; promotion engines such as Voucherify; Tailwind CSS; and design systems or component libraries.

• Other valuable experience: Consent management platforms such as OneTrust, privacy-conscious analytics, international products involving multiple currencies and locales, and accurate date and timezone handling.

• Growth and marketing experience is beneficial: Funnel optimization, rapid experimentation, acquisition and conversion metrics, event tracking, UTM and referral attribution, advertising conversion tracking, landing pages, email capture, referral programs, promotional codes, and abandoned-cart recovery.

• Familiarity with identity providers such as Auth0, scheduling or booking platforms, consumer healthcare applications, or highly regulated industries is an advantage.

• Must be legally authorized to work in the United States at the time of hire and must not require employer sponsorship for a work visa now or in the future.