Member of Technical Staff, Mobile Engineer

What you’ll do

• 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

What you’ll need

• 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

Nice to have

• Experience building AI-powered or LLM-integrated mobile experiences
• Background in in-app purchases (StoreKit / Google Play Billing)