> Markdown version of [/jobs/ext/2732643-web-engineer-fantasy-sports](https://www.wearedevelopers.com/jobs/ext/2732643-web-engineer-fantasy-sports). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Web Engineer (Fantasy Sports) - **Company:** Joseph Sleeper & Sons, Inc. - **Location:** San Francisco, CA, United States - **Experience:** Expert - **Salary:** $160,000.0 - $220,000.0 - **Contract:** Permanent contract - **Skills:** Clean Code Principles, Computer Animation, Application Programming Interfaces (APIs), Software Debugging, Web Development, Next.js, TypeScript, Web Content Accessibility Guidelines, Web Strategies, Tailwind, ReactJS, Information Technology, Graphql, Restful APIs, Data Caching - **Published:** September 5, 2026 - **Apply:** https://startup.jobs/senior-web-engineer-fantasy-sports-sleeper-9926974 ## About the Role Our web experience is built with React and Typescript, along with Tailwind, React Query, and NextJS. We're looking for an experienced web developer who can bring their knowledge and skills to help shape it; bringing new features, improved quality, and lightning fast performance to our millions of users. You'll have real ownership over what you build and a direct hand in the product decisions behind it., * An active fantasy sports player: you're in leagues each season and have opinions about how the product should work * 5+ years of web application development experience, with React as your primary framework * Experience building and owning a large-scale, consumer-facing application - not a series of smaller one-off projects * A strong eye for interaction detail, with real depth in animation and gesture work on the web * Desire to take on and own a large scale product with freedom to design and develop a best in class experience * Comfortable in fast-paced and ambiguous environments, equally at home extending an existing codebase and standing up new surfaces * Hold a degree in Computer Science or have equivalent experience ## Description 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 the fantasy experience on web, ensuring it's scalable, reliable, and fast for millions of dedicated users every day., * Collaborate with designers to understand user requirements and translate them into technical specifications for our fantasy sports product. * Write clean, maintainable, and efficient code using React, Typescript, and related libraries (Tailwind, React Query, NextJS, etc.). * Build fluid, responsive interfaces with a strong emphasis on animation and gesture, the interactions that make the product feel fast and alive. * Troubleshoot and debug complex performance, socket, data caching and other issues. * Develop reusable UI components and implement a well-structured component hierarchy for the application. * Integrate front-end components with back-end services using APIs (RESTful or GraphQL). * Stay up-to-date on the latest advancements in React, web development best practices, and accessibility guidelines. ## Related Videos - [GraphQL + Apollo + Next.js: A Lovely Trio](https://www.wearedevelopers.com/videos/311-graphql-apollo-next-js-a-lovely-trio) - [WeAreDevelopers LIVE – AI, Freelancing, Keeping Up with Tech and More](https://www.wearedevelopers.com/videos/1786-wearedevelopers-live-ai-freelancing-keeping-up-with-tech-and-more) - [Putting the Graph In GraphQL With The Neo4j GraphQL Library](https://www.wearedevelopers.com/videos/257-putting-the-graph-in-graphql-with-the-neo4j-graphql-library) - [Watch Tests Go Brrrr! : Getting Started with Cypress in ReactJS](https://www.wearedevelopers.com/videos/282-watch-tests-go-brrrr-getting-started-with-cypress-in-reactjs) - [But, you're not Facebook](https://www.wearedevelopers.com/videos/378-but-you-re-not-facebook) - [From Zero to Hero: NextJS 13 and Tailwind CSS for Beginners](https://www.wearedevelopers.com/videos/766-from-zero-to-hero-nextjs-13-and-tailwind-css-for-beginners) ## Related Articles - [16 Best Free React UI Libraries in 2025](https://www.wearedevelopers.com/magazine/148-16-best-free-react-ui-libraries-in-2025) - [Dev Digest 133 - Back to Front](https://www.wearedevelopers.com/magazine/474-dev-digest-133-back-to-front) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [The Best 7 Frontend Frameworks for Developers in 2025](https://www.wearedevelopers.com/magazine/400-the-best-7-frontend-frameworks-for-developers-in-2025) - [Web Development Best Practices: What The Data Tells us](https://www.wearedevelopers.com/magazine/84-web-development-best-practices-what-the-data-tells-us) - [Dev Digest 113 - Debugging above the cloud](https://www.wearedevelopers.com/magazine/422-dev-digest-113-debugging-above-the-cloud)