Lead Mobile Engineer (React Native)
ScorePlay is a free football score-prediction game built on Base where players predict exact match scores rather than just the winner. Leagues can be started by sending a single link, and results are recorded on-chain for a public, permanent leaderboard.
Projects
About ScorePlay
ScorePlay is a football prediction platform where users compete to call the exact scoreline of matches, not just the winner, with the closest guess winning each round. Leagues are easy to set up and join via a single shareable link, requiring no spreadsheets or wallets for participants. The platform automatically updates standings as matches conclude, with results stored on-chain on Base to ensure the final table is public and permanent. Users can track live probabilities, AI-driven predictions, and stats for every match, making it accessible to casual football fans and friend groups looking to compete for free.
Skills
About the Role
You will take ownership of ScorePlay's mobile application, a key part of the product experience used by sports organizations worldwide. You will drive the technical direction and roadmap of the app, built almost entirely in React Native, with autonomy and impact, owning the mobile product end-to-end while collaborating across product, design, and backend teams.
Requirements
- 5+ years of mobile development experience, with strong expertise in React Native in a production environment
- Comfortable working in fast-moving environments with evolving priorities
- Solid understanding of mobile architecture, state management, and native module integration
- Strong communication in English (French is a plus)
- Ideally based in Paris, but open to remote position based in France
- A mindset focused on quality, pragmatism and delivery
Responsibilities
- Design, build, and maintain the React Native application, ensuring a smooth and performant user experience across platforms
- Own the mobile architecture and make key technical decisions as the app evolves
- Help shape the mobile roadmap in close collaboration with product and design
- Translate product vision into concrete technical plans and ship iteratively
- Monitor app performance, crash rates, and user experience metrics
- Optimize for speed, stability, and scalability as usage grows
- Partner with backend engineers, designers, and product managers to deliver seamless features
- Help bridge the gap between mobile, backend, and infrastructure teams
- Test, debug, and review code to ensure functionality, performance, and resilience
- Implement testing strategies and contribute to shared best practices across the team
- Lead by example through code reviews, mentoring, and sharing best practices
- Contribute to a culture of technical excellence and learning