Full Stack React Developer

Have you always wanted to build an award winning Website that is used as example of what to strive for by others? Then you ambition matches ours. Tell us what you need to make it happen! The more successful we are, there more people we will help lead healthier, happier lives!

Wellis is a fast-growing healthtech scale-up that is reinventing one of the most traditional sectors: healthcare. What started just three years ago has already grown into a company with tens of thousands of customers, and we are only at the beginning. By combining medical expertise with technology and data, we make healthcare smarter, more efficient, and more personal.

Our mission is to improve everyday lives by making care accessible, personal, and seamless. Through our platform, people can take control of their health journey with trusted medical support, smart digital tools, and tailored programs. We move fast, challenge conventions, and build solutions that truly make an impact, because we believe better healthcare should be within everyone's reach.

You will build our web portal (React), working from a shared design system and consuming a unified API layer. This is a full stack frontend role — you own the UI from component implementation through state management through API integration through deployment.

You'll work closely with the Product Designer (who owns the design system and Figma source of truth) and with the PO/PM, who owns the backlog. The Core Platform squad delivers the FastAPI endpoints you consume; your job is to turn those endpoints into interfaces that patients love and trust.

• Experience with React Native in shipped mobile applications. The bridge, native modules where needed, navigation patterns (React Navigation), and platform-specific considerations.

• Experience with shared component libraries that serve both React and React Native.

• Experience with healthcare or regulated-industry applications where data accuracy and user trust are critical.

• Familiarity with OAuth 2.0/OIDC flows and biometric authentication (FIDO2/WebAuthn, FaceID, TouchID).

• Experience with testing frameworks: Jest, React Testing Library, Detox or Maestro for mobile E2E.

• Performance optimisation experience: bundle analysis, render optimisation, image handling, offline-first patterns.

• Experience with CI/CD for mobile (Fastlane, EAS Build, App Store/Play Store deployment pipelines).

• Dutch and/or German language skills.

• You care about the user. You think about the 70-year-old patient who needs large text and clear buttons as much as the 30-year-old who expects snappy animations.

• You are a craftsperson. Clean component architecture, meaningful naming, comprehensive types, and well-organised code matter to you.

• You can work across web and mobile without treating one as secondary. Both surfaces are first-class products.

• You collaborate closely with designers. You respect the design system, push back thoughtfully when implementation constraints arise, and contribute to component API design.

• You thrive in a small team where your code ships to real patients. No layers of abstraction between you and the user.

We want the application process at Wellis to be fast, transparent, and personal.