Sleeper · 1 month ago
Senior Frontend Engineer (Mobile)
United States
Full-time
Remote
Senior Level
$180K/yr - $235K/yr
5+ years expSleeper is a rapidly expanding platform for fantasy sports and games, revolutionizing the way sports fans connect and engage. The Senior Frontend Engineer will play a crucial role in developing mobile and web products to ensure scalability, reliability, and quality, impacting millions of dedicated users every day.
eSportsFantasy SportsMessagingMobileSports
Responsibilities
Collaborate with designers to understand user requirements and translate them into technical specifications for our products
Write clean, maintainable, and efficient code using React Native, TypeScript, and related libraries (React Query, Navigation, Reanimated, etc)
Develop reusable UI components and implement a well-structured component hierarchy for the application
Implement user interface (UI) functionality and logic using React features like state management, props, hooks, and lifecycle methods
Integrate front-end components with back-end services using APIs (RESTful or GraphQL)
Troubleshoot and debug complex performance, socket, data caching and other issues
Stay up-to-date on the latest advancements in React, mobile development best practices, and accessibility guidelines
Qualification
Required
A degree in Computer Science or equivalent experience
5+ years of mobile / web development with an emphasis on frontend
Desire to take on and own a large scale product with freedom to design and develop a best in class product
Proven ability to develop and implement algorithms or systems in a professional setting, with strong coding skills in Javascript and knowledge of best practices
Highly proactive, with a track record of building processes from scratch and a willingness to challenge traditional risk management paradigms
Comfortable in fast-paced, ambiguous environments, thriving on innovation and the challenge of creating something new
Benefits
Medical
Dental
PTO
401k
Company
Sleeper
Sleeper is a sports platform intended for fantasy leagues and eSports.
51-200 employees
H1B Sponsorship
Sleeper has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (2)
2023 (1)
2022 (1)
2021 (1)
2020 (2)
Funding
Current Stage
Growth StageTotal Funding
$67.3MKey Investors
Andreessen HorowitzGeneral CatalystBirchmere Ventures
2021-09-16Series C· $40M
2020-05-12Series B· $20M
2018-10-01Series A· $5.3M
Leadership Team
Nan Wang
Chief Executive Officer
Henry Leung
Cofounder
Recent News
2025-11-01
Company data provided by crunchbase