Develop, maintain, and enhance our React Web app
Take ownership of frontend architecture and contribute to long-term technical decisions
Implement features involving offline functionality, maps & geolocation, secure data handling, and real-time interactions
Ensure performance, stability, and a great user experience
Work closely with our Product Owner and engineering team to refine requirements
Participate in code reviews, testing, and continuous improvement of development processes
Collaborate across disciplines to deliver high-quality, mission-critical software

3+ years of experience building applications with React
Strong knowledge of JavaScript/TypeScript and web architecture patterns
Experience with offline-capabilities, maps & geolocation services, and mobile security best practices
Familiarity with REST APIs; experience with Ruby on Rails is a plus
Hands-on, ownership-driven mindset with attention to detail and quality
Ability to work mostly overlapping with CET (±2 hours)
English fluency; German is a plus
Valid work authorization for Germany (employment via SEON GmbH)

Fully remote work setup within CET ±2 hours, with optional access to our offices in Hamburg and Cape Town
Participation in our VSOP equity program
Competitive salary and a high-flexibility, trust-based work culture
Work on a product that directly contributes to faster, safer emergency response
Join an international, collaborative team with modern technologies (React Native, Expo, React, Ruby on Rails)
Real ownership and influence on the direction of our mobile applications
Opportunity to build technology that truly makes a difference

Senior Frontend Developer

Key skills