Frontend Engineer - Mobile

Remote; San Francisco (CA); Remote; USD 120,000 - 180,000; Full time

Job summary

Betr is seeking a Frontend Engineer to join our mobile team. You will build React Native and TypeScript applications powering our Sportsbook, Social Sweepstakes Sportsbook, Arcade, and Casino across iOS, Android, and web.

This high-impact role involves end-to-end feature ownership with real-time WebSocket data feeds, canvas-based graphics, and a design system with 100+ shared components. Remote-first role, Canada-based.

Qualifications

• 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.

Responsibilities

• 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.

Skills

Frontend development

React Native

TypeScript

Reanimated

Performance optimization

Tools

WebSocket

GraphQL

React Skia

Job description

Defining the future of work & living globally

Founded in 2022 by Joey Levy and Jake Paul, Betr has built the world's first real money gaming Super App. The Betr super app currently consists of Picks, Social Sportsbook, Social Casino, and Arcade - and will soon include Prediction Markets alongside other new products. Betr has one million paying users and is one of the fastest growing companies in the industry.

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

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