Betr is looking for a Frontend Engineer to join our mobile team! You'll build React Native and TypeScript applications powering our Sportsbook, Social Sweepstakes Sportsbook, Arcade, & Casino products across iOS, Android, and web
This is a high-impact role to own features end-to-end, work with real-time WebSocket data feeds, build hardware-accelerated graphics and physics-based animations, and ship polished products to users across multiple US states with strict regulatory requirements
Build and ship features for sportsbook, casino, and fantasy apps using React Native
Implement complex UI: market layouts, betting slips, player props, lobby experiences
Create physics-based animations and gesture-driven interactions (carousel pagers, radial controls, animated transitions)
Work with canvas-based graphics for player cards, game visualizations, and dynamic effects
Contribute to our theme-based design system with 100+ shared components
Build and maintain WebSocket subscriptions for live odds, match updates, and user notifications
Implement state synchronization between real-time streams and local stores
Handle deep linking from push notifications, attribution links, and web referrals
Integrate payment flows: in-app purchases, bank transfers, card entry with verification
Debug and fix platform-specific issues across iOS, Android, and web
Optimize performance: animation frame rates, render efficiency, memory management
Write worklet functions for animation-thread execution
Maintain E2E automation tests and contribute to CI/CD pipelines