Senior Mobile Engineer (React Native & Expo)

Senior Mobile Developer Zagreb | Hybrid F24 is Europe's leading crisis management SaaS platform, trusted by governments, airlines, banks, and Fortune 500s in over 100 countries. When a major incident unfolds, our software is the system people rely on. Our Zagreb Tech Centre is already up and running. Wave 1 of our engineering team is in place, and we're now expanding into Wave 2, bringing in more senior engineers to accelerate the work already underway. Why F24? You'll be working on technology that genuinely matters. F24's Emergency Notification System (ENS) is a mission-critical platform for real-time crisis communication, used by millions of users globally. The mobile experience sits at the heart of that - and it's being built for the next generation, with cloud-native architecture, advanced mobile security, and offline-first capabilities. This is an opportunity to: ✔️ Build software used by 5,500+ organisations worldwide ✔️ Work on high-scale, high-availability mobile applications that perform in real emergencies ✔️ Influence mobile architecture decisions and engineering best practices ✔️ Join a growing engineering hub with significant investment and long-term growth plans ✔️ Collaborate with Product, Engineering, QA and Architecture teams across Europe ✔️ Help build secure, resilient mobile systems that people depend on in a crisis What You'll Bring: ✔️ Strong React Native development experience with Expo ✔️ A background working in product-led SaaS environments ✔️ Practical exposure to AI tools (e.g. Copilot) or experience integrating ML features ✔️ A collaborative mindset and a desire to solve complex technical challenges like offline-first architecture, performance optimisation, and mobile security Tech Stack: React Native | Expo | MobX | Swift | Kotlin/Java | Firebase | Realm | Axios | Docker | Kubernetes | CI/CD | Automated Testing About F24 F24 is Europe's leading provider of crisis management and emergency notification software. Trusted by more than 5,500 organisations globally, we're helping businesses protect their people, operations, and reputation when it matters most. If you're looking for a role where you can make a genuine impact while helping shape a growing engineering organisation, we'd love to hear from you. Salary is paying up to €48,420 (Gross) annually.