Senior Mobile Engineer (React Native)

About the role

Kantoko is building a patient mobile app that enables people with ADHD to access diagnosis, treatment and long‑term support. As a Senior Mobile Engineer you will own the app, shape its technical direction and deliver new features that directly improve patients' lives.

Key responsibilities

• Own the patient mobile app’s architecture, development and ongoing technical roadmap.
• Ship new patient‑facing features from concept through production, collaborating with product, design, engineering and operations.
• Evolve mobile architecture, testing strategy and release pipeline, maintaining a fast and predictable cadence on the App Store and Play Store.
• Ensure performance, reliability, crash reporting, analytics and error handling meet high standards.
• Build and improve core functionality such as push notifications, deep links, secure authentication flows, permissions and accessibility.

Required profile

• Excited to join an early‑stage startup and take full ownership of a mobile product.
• Proven ability to ship features quickly, iterate based on user feedback and prioritize effectively.
• Strong architecture instincts for navigation, state management and error handling.
• Passionate about performance and smooth user experience.

Required skills

• React Native
• Expo
• TypeScript
• Python
• Django

What we offer

• Hybrid working – 3 days per week in our Central Station office.
• Generous ESOP plan.
• Small, quirky team culture that celebrates individuality.
• Direct impact on patients’ health and wellbeing.