# Senior React Native Engineer (Fantasy Sports) at Sleeper

- Company: Sleeper
- What the company does: Fastest live scores, standings, and player updates across NFL, NBA, CBB, MLB, NHL, and WNBA. Backed by General Catalyst and a16z.
- Company website: https://sleeper.app/
- Type: Startups
- Level: Senior
- Location: San Francisco Hybrid, New York City Hybrid
- Work setup: Remote
- Pay: $180K to $235K base salary per year (USD)
- Posted: 2026-09-05
- Apply by: 2026-10-20
- Apply: https://jobs.ashbyhq.com/sleeper/3c8a410a-1294-47dc-aea8-8f50fbc9e134
- Page: https://www.1752.vc/careers/jobs/sleeper-senior-react-native-engineer-fantasy-sports/

## About the role

You'll be working on our fantasy sports product — season-long leagues, drafts, matchups, live scoring, and the social layer that connects them. It's the core of Sleeper, with traffic that peaks hard on game days and a season calendar that doesn't move. You will play a crucial role in developing our mobile application to ensure scalability, reliability, and quality, impacting millions of dedicated users every day.

## What they're looking for

- An active fantasy sports player: you're in leagues each season and have opinions about how the product should work
- 4+ years of mobile application development experience, with React Native as your primary framework
- Desire to take on and own a large scale product with freedom to design and develop a best in class experience
- Proven ability to develop and implement algorithms or systems in a professional setting, with strong coding skills and knowledge of best practices
- Comfortable in fast-paced and ambiguous environments, working inside a large, established codebase
- Hold a degree in Computer Science or have equivalent experience

Tags: Engineering