About the job
We are looking for a Mobile Engineer to join our team and help build the next generation of AI-powered creative tools on iOS and Android. You will own key product surfaces in our React Native app, from generative video workflows and an AI assistant chat experience, to real-time media playback, ad/storyboard creation tools, and character interactions powered by LiveKit. Ownership here goes beyond writing code: you will instrument features for measurement, manage feature-flag rollouts, monitor for stability and usability post-launch, and use those insights to help inform what we build next. We are seeking engineers with strong mobile fundamentals, a high bar for UX quality, and the drive to see features through from prototype to production and beyond.
Responsibilities
- Build and ship product features in a React Native app that puts cutting-edge generative AI video models directly in users' hands
- Own features through their full lifecycle: instrument analytics, manage feature-flag rollouts, monitor stability and usability post-launch, and surface learnings that inform next steps
- Help keep the mobile app up to date with the latest AI capabilities and contribute to a continuous stream of experiments aimed at improving retention and engagement
- Own complex, media-rich UI surfaces: video playback and cropping, asset galleries, multi-step storyboard/ad-builder workflows, and interactive prompt interfaces
- Bring strong UX taste to every feature, ensuring interactions feel polished, intuitive, and native to each platform
- Develop and maintain an AI-powered chat assistant experience with streaming responses, tool-use handlers, and rich message rendering
- Integrate real-time audio/video features using LiveKit for character call experiences
- Collaborate with backend and web engineers to design and consume APIs that power generative AI tools, asset management, billing, and in-app purchases
- Improve app performance, startup time, animation smoothness, and reliability across iOS and Android
- Participate in release engineering, managing EAS builds, OTA updates, and App Store / Play Store submissions
Qualifications
Minimum
- 5+ years of industry experience in mobile engineering, with production experience on React Native (TypeScript), iOS (Swift/UIKit or SwiftUI) or Android (Kotlin)
- A high-ownership mindset: you care about what happens after code merges, from rollout and monitoring to measuring impact and iterating
- A keen eye for UX quality and attention to detail in interactions, animations, and visual polish
- Experience with mobile navigation patterns, complex state management, and performance optimization on resource-constrained devices
- Familiarity with media handling on mobile: video playback, image manipulation, camera, or audio
- Experience shipping apps through the App Store and/or Google Play, including familiarity with build tooling, code signing, and OTA update mechanisms
- Comfort working with RESTful APIs and integrating third-party SDKs (analytics, auth, payments)
- Ability to rapidly prototype solutions and iterate under tight product deadlines
- Humility and open-mindedness; at Runway we love to learn from one another
Preferred
- Experience building AI-powered or LLM-integrated mobile experiences
- Background in in-app purchases (StoreKit / Google Play Billing)