Senior React Native Engineer

Fliff unpacks sports gaming into social, free-to-play games for all types of sports fans. We ve built a social sports gaming experience that allows users to compete for leader board positioning, to achieve badges and build their status within the game.

We are pioneering play-for-fun sports gaming, with our flagship social sports book experience that includes sweepstakes promotions and loyalty rewards. We provide sports fans with fun, engaging, and free-to-play alternatives to real money gaming.

We re seeking a Senior React Native Engineer to help build and scale mobile experiences for our Fantasy platform. You ll join the Fantasy team — a cross-functional group of engineers and product managers focused on delivering high-performing, user-friendly applications across mobile and desktop.

You should have a deep understanding of modern React patterns, strong Type Script expertise, and the ability to ship high-quality code in a fast-paced, collaborative environment. Domain experience in sports betting or real-time data platforms is a strong plus.

• Design, develop, and maintain responsive, performant mobile applications using React
  
  JS and Type Script.
• Implement scalable, reusable UI components with CSS/SCSS.
• Build seamless experiences across mobile and desktop devices, iOS and Android.
• Collaborate with engineers, designers, product managers, and QA to deliver high-impact features.
• Integrate REST APIs and Web Socket services into the frontend.
• Optimize for performance, maintainability, and reliability.
• Review code, share feedback, and mentor junior engineers.
• Debug and troubleshoot frontend issues using modern developer tools.

• 5+ years of experience in frontend development, with a focus on React Native.
• Strong proficiency with JavaScript (ES6+) and Type Script 5.0+, including utility types, generics, and advanced type safety.
• Deep understanding of React fundamentals, React 16.0 or higher.
• Solid experience integrating REST APIs with tools like fetch and axios.
• Experience and understanding of GraphQL and Apollo Client
  .
• Working knowledge of Web Sockets (native or non-blocking socket implementations).
• Proficiency in debugging with Reactive Tools from XCode + Profiler and Android Studio + Log Cat.
• Testing experience with Jest and React Testing Library
  .
• Integration with Sentry or other crash analytics tools
• Heavy usage of analytic tools (Data Dog, Mix Panel, Google Analytics, etc)
• Knowledge of ESLint
  , and formatting tools like Prettier
  .
• Experience of UI design tools like Figma
  , Sketch
  , or Zeplin
  .
• Understanding and knowledge of Native Package Managers (Cocoa Pods for iOS and Gradle for Android).
• Strong communication skills and a proactive, ownership-driven mindset.
• Interest and experience in the sports betting or fantasy sports industry.

• Experience using Storybook for documenting components.
• Exposure to Detox for end-to-end testing.
• Knowledge of Reanimated Library.
• Experience with chat integration.

• The annual salary for this role ranges from $180,000 to $200,000 depending on experience and background.
• Unlimited/ Flexible Time Off:
  Flexible vacation policy.
• Health benefits with 100% paid premiums for medical, dental, and vision plans for employees and dependents, plus on-demand healthcare concierge.
• Pre-tax savings plans for healthcare, with up to a $500 annual employer contribution to the HSA (if enrolled in the HSA medical plan).
• Employee-sponsored 401(k) to help reach your financial goals.
• Fully remote work environment.
• Generous parental leave.
• Professional development opportunities in a dynamic, global setting.

• Work Remotely.
• $500 work-from-home stipend + Equipment & Accessories.
• Opportunity for professional development in a dynamic, global setting.
• A supportive, collaborative, and knowledge-driven workplace.
• An engaging and challenging role with the freedom to innovate and develop effective solutions.

#LI-Remote

We are a multinational company with our headquarters based in Philadelphia, and offices in New York, Austin, and Sofia, Bulgaria. Wherever we are in the world, we pride ourselves on being a close-knit, focused team that is welcoming and friendly, and the work that we do is always…