Frontend Engineer - Mobile

About the Role:

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.

What You'll Do:

• 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

Real-Time & Integration

• 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

Platform & Quality

• 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

What We're Looking For:

• 4+ years of professional front-end development
• 2+ years building production React Native apps (iOS and Android)
• Strong TypeScript skills with modern patterns
• Experience with Reanimated: shared values, worklets, gesture handlers
• Track record shipping polished, production-quality mobile apps
• Experience debugging platform-specific issues
• Understanding of mobile performance optimization

Nice To Have:

• Sports betting, gaming, or fintech experience
• Canvas-based graphics experience (React Skia or similar)
• Real-time data architecture (WebSocket management, GraphQL subscriptions)
• React Native Web / multi-platform experience
• Design system tooling (Storybook, visual regression testing)
• Payment integration experience (IAP, 3DS verification)
• E2E mobile testing experience

Why Join Us!

• High Impact: Own significant features that directly affect user experience and business metrics
• Technical Depth: Real-time systems, hardware-accelerated graphics, physics-based animation-not just standard mobile UI
• Product Variety: Work across sportsbook, casino, and fantasy verticals
• Growth: Rapidly expanding into new states and product lines
• Remote-First: Work from anywhere in Canada