\u003C/p>\u003Ch3>\u003Cstrong>About Sleeper\u003C/strong>\u003C/h3>\u003Cp style=\"min-height:1.5em\">Sleeper is on a mission to connect people over sports through games and community. As one of the fastest-growing platforms in the fantasy sports and real-money gaming space, we’re redefining how sports fans engage—whether it’s through season-long leagues, pick’em contests, or real-time interactions with friends.\u003C/p>\u003Cp style=\"min-height:1.5em\">Our team is lean, passionate, and product-driven. We obsess over user experience and believe that building delightful, fast, and reliable products is the best way to grow. Backed by some of the most respected investors in Silicon Valley, including Andreessen Horowitz and General Catalyst, we're building the future of sports engagement.\u003Cbr />\u003C/p>\u003Ch3>\u003Cstrong>About the Role\u003C/strong>\u003C/h3>\u003Cp style=\"min-height:1.5em\">We’re looking for a Staff Software Engineer - Backend to help us scale the core systems behind our fantasy sports and DFS (Daily Fantasy Sports) offerings. In this role, you’ll drive architectural decisions, build critical backend services, and mentor fellow engineers as we scale to support tens of millions of passionate sports fans.\u003C/p>\u003Cp style=\"min-height:1.5em\">As a senior technical leader, you’ll collaborate cross-functionally to bring innovative features to life—from real-time contest engines and game logic to personalized content and secure, seamless payments. You’ll be empowered to own major parts of the backend stack and help define what \"great\" looks like in terms of performance, scalability, and reliability at Sleeper.\u003Cbr />\u003C/p>\u003Ch3>\u003Cstrong>What You’ll Do\u003C/strong>\u003C/h3>\u003Cul style=\"min-height:1.5em\">\u003Cli>\u003Cp style=\"min-height:1.5em\">Design and build core backend systems that power Sleeper's games and real-time user experiences—fantasy contests, Sleeper Picks, user profiles, leaderboards, and more.\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Architect scalable, distributed systems capable of handling millions of concurrent users with low latency and high availability.\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Lead backend initiatives from concept to deployment, ensuring clean interfaces, well-documented services, and resilient infrastructure.\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Optimize system performance and proactively address bottlenecks through monitoring, profiling, and capacity planning.\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Collaborate cross-functionally with product, design, and frontend teams to deliver features that users love.\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Mentor engineers, provide thoughtful code reviews, and shape backend engineering best practices and standards.\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Drive innovation, technical direction, and team culture as a key engineering voice at the leadership level.\u003C/p>\u003C/li>\u003C/ul>\u003Ch3>\u003Cstrong>Who You Are\u003C/strong>\u003C/h3>\u003Cul style=\"min-height:1.5em\">\u003Cli>\u003Cp style=\"min-height:1.5em\">7+ years of backend software engineering experience, including experience in staff-level or tech lead roles.\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Proven ability to design and scale distributed systems that serve millions of users in real-time or gaming environments.\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Strong proficiency in one or more backend languages (e.g., Go, Python, Node.js, Java), and an understanding of trade-offs between them.\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Deep knowledge of databases (both SQL and NoSQL), caching strategies, and message queues (e.g., Kafka, RabbitMQ, Pub/Sub).\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Comfortable designing and maintaining RESTful and/or graphql APIs, data models, and internal tooling.\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Cloud experience (AWS, GCP, or similar), with familiarity with containers (Docker) and orchestration (Kubernetes a plus).\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Strong product mindset—you care about the why, not just the how, and you build with users in mind.\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Excellent communication and collaboration skills. You elevate your teammates and enjoy mentoring.\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Bonus: Passion for sports, gaming, or building multiplayer or real-time systems.\u003C/p>\u003C/li>\u003C/ul>\u003Ch3>\u003Cstrong>Why Join Sleeper?\u003C/strong>\u003C/h3>\u003Cul style=\"min-height:1.5em\">\u003Cli>\u003Cp style=\"min-height:1.5em\">Massive Impact – Your work will touch millions of users and help shape the next generation of sports entertainment.\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">High Ownership – We trust our engineers to make high-leverage decisions and drive meaningful outcomes.\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Startup Agility – Move fast, ship often, and see your work in the hands of users quickly.\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Culture-First Team – We’re a team of builders, thinkers, and sports lovers who value humility, collaboration, and having fun along the way.\u003C/p>\u003C/li>\u003C/ul>\u003Ch3>\u003Cstrong>What We Offer\u003C/strong>\u003C/h3>\u003Cul style=\"min-height:1.5em\">\u003Cli>\u003Cp style=\"min-height:1.5em\">Competitive salary ($225,000–$300,000/year not inclusive of stock options and benefits)\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Equity\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Comprehensive medical, dental, and vision insurance\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">401(k) with company matching\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Generous PTO and flexible remote work policy\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Opportunities for fast career growth in a high-impact role\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">A small, focused team where your contributions truly matter\u003Cbr />\u003C/p>\u003C/li>\u003C/ul>\u003Ch3>\u003Cstrong>Our Hiring Philosophy\u003C/strong>\u003C/h3>\u003Cp style=\"min-height:1.5em\">Sleeper believes in quality over quantity, and intentionally keeps our team small as a result. In past roles, we found it very hard to make a big impact when companies grow too large in size, which has a detrimental effect on the product and the impact any single individual can have. Our team includes designers, engineers, product experts, and finance & operation focused on one thing — connecting people over sports. We believe in fair and equitable pay. Certain locations in the United States require job postings to include a reasonable estimate of the base salary range and/or a general description of benefits and other compensation applicable to the role.\u003Cbr />\u003C/p>\u003Cp style=\"min-height:1.5em\">Competitive salary plus benefits including Medical, Dental, PTO, 401k. Please note that The salary range for this role ($225,000 to $300,000 per year salary) takes into account a wide range of factors that are considered in making compensation decisions including, but not limited to, skill sets; experience and training; licensure and certifications; and other business and organizational needs. The policy of Sleeper is to provide equal employment opportunities to all applicants and employees without regard to race, color, creed, religion, sex, sexual orientation, gender identity, marital status, citizenship status, age, national origin, ancestry, disability, veteran status, or any other legally protected status and to affirmatively seek to advance the principles of equal employment opportunity. Sleeper is committed to being an Equal Opportunity Employer and offers opportunities to all job seekers, including job seekers with disabilities. If you are a qualified individual with a disability or a disabled veteran, you may request a reasonable accommodation if you are unable or limited in your ability to use or access the Company’s career webpage as a result of your disability. You may request reasonable accommodations by sending an email to jobs@sleeper.app.\u003Cbr />\u003Cbr />Headquartered in Las Vegas, NV, Sleeper is backed by Silicon Valley’s top investors, including Andreessen Horowitz, General Catalyst, and Expa.\u003C/p>\u003Cp style=\"min-height:1.5em\">\u003Cbr />To learn more, visit us online at:\u003Ca target=\"_blank\" rel=\"noopener noreferrer nofollow\" href=\"http://www.sleeper.com\"> \u003Cu>www.sleeper.com\u003C/u>\u003C/a>\u003C/p>","https://jobs.ashbyhq.com/sleeper/6c667885-d9dc-4ab8-9a57-45d7fc5f13c7",{"id":50,"name":51,"urlSafeSlug":51,"logo":52},[517,520],{"city":518,"region":519,"country":27},"Las Vegas","Nevada",{"city":21,"region":21,"country":27},"2025-09-17T07:18:32.837Z","Candidates must have 7+ years of backend software engineering experience, including staff-level or tech lead roles, and a proven ability to design and scale distributed systems for millions of real-time or gaming users. Strong proficiency in backend languages like Go, Python, Node.js, or Java is required, along with deep knowledge of databases (SQL/NoSQL), caching, message queues, and cloud platforms (AWS, GCP). Experience with containers (Docker) and orchestration (Kubernetes) is a plus, as are excellent communication, collaboration, and mentoring skills, and a strong product mindset.","The Staff Software Engineer will design and build core backend systems for fantasy sports and DFS offerings, architecting scalable, distributed systems for millions of concurrent users with low latency and high availability. They will lead backend initiatives from concept to deployment, optimize system performance, and collaborate cross-functionally with product, design, and frontend teams. Additionally, the engineer will mentor other engineers, provide code reviews, shape backend engineering best practices, and drive innovation and technical direction.",{"employment":525,"compensation":527,"experience":528,"visaSponsorship":534,"location":535,"skills":536,"industries":545},{"type":526},{"id":97,"name":98,"description":471},{"minAnnualSalary":21,"maxAnnualSalary":21,"currency":21,"details":21},{"experienceLevels":529},[530],{"id":531,"name":532,"description":533},"de6fc08d-b7f4-4514-8560-7f69a3611e1e","Expert & Leadership (9+ years)","Leverage deep expertise and lead strategic initiatives.",{"type":11},{"type":11},[537,538,373,539,540,541,542,543,372,544],"Backend Systems","Distributed Systems","Low Latency","High Availability","System Architecture","Performance Optimization","Real-time Systems","Mentorship",[546,547,549,551],{"id":278,"name":381},{"id":278,"name":548},"Real-money Gaming",{"id":278,"name":550},"Sports Engagement",{"id":552,"name":553},"818c13b7-d12c-4a43-91e4-2a8848689732","Biotechnology",{"id":555,"title":556,"alternativeTitles":557,"slug":573,"jobPostId":555,"description":574,"applyUrl":575,"company":51,"companyOption":576,"locations":577,"listingDate":579,"listingSite":89,"isRemote":17,"requirements":580,"responsibilities":581,"status":93,"expiryDate":21,"summary":582},"b68b1e9b-c9ca-4c53-8308-045da98a3af3","Senior Frontend Web Engineer",[558,559,560,561,562,563,564,565,566,567,568,569,570,571,572],"Lead React Developer","Principal Frontend Engineer","Senior JavaScript Engineer (React)","Frontend Architect (React)","Senior UI Engineer (React)","Head of Frontend Development","Senior Web Application Developer (React)","Technical Lead Frontend","Senior JavaScript Architect","ReactJS Lead Developer","Senior Full-Stack Engineer (Frontend Focus)","Senior Software Engineer, Frontend (React)","Senior Client-Side Developer","Senior JavaScript Developer (React)","Lead UI/UX Engineer (React)","senior-frontend-web-engineer-b68b1e9b-c9ca-4c53-8308-045da98a3af3","Location Type: Remote\n\nEmployment Type: FullTime\n\n\u003Cp style=\"min-height:1.5em\">\u003Cstrong>About Sleeper:\u003Cbr />\u003C/strong>Sleeper is a rapidly expanding platform for fantasy sports and games, revolutionizing the way sports fans connect and engage. With Sleeper Picks, our real-money Daily Fantasy Sports (DFS) game, users predict player performance against statistical projections provided by third-party vendors. We are at the forefront of innovation in the sports gaming industry, backed by some of Silicon Valley's top investors.\u003Cbr />\u003C/p>\u003Cp style=\"min-height:1.5em\">\u003Cstrong>Role Overview:\u003C/strong>\u003C/p>\u003Cp style=\"min-height:1.5em\">We are searching for a highly intelligent and innovative Frontend Web Engineer to join our team. At Sleeper, we believe in the power of smart, creative individuals to drive change and build incredible things, regardless of their background in specific technologies. You will play a crucial role in developing our web products to ensure scalability, reliability, and quality, impacting millions of dedicated users every day.\u003C/p>\u003Cp style=\"min-height:1.5em\">Sleeper is a rapidly growing platform for sports fans with social at its core. Our web platform consists primarily of React, typescript, and webpack and shares much of its core with our mobile product. We’re looking for an experienced web developer who can bring their knowledge and skills to help refine our web product; bringing feature, quality, and technology parity to our mobile experience.\u003Cbr />\u003C/p>\u003Cp style=\"min-height:1.5em\">\u003Cstrong>Responsibilities:\u003C/strong>\u003C/p>\u003Cul style=\"min-height:1.5em\">\u003Cli>\u003Cp style=\"min-height:1.5em\">Collaborate with designers to understand user requirements and translate them into technical specifications for the React web application.\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Write clean, maintainable, and efficient code using React, JS, and related libraries (Tailwind, React Query, NextJS, etc.).\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Develop reusable UI components and implement a well-structured component hierarchy for the React application.\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Implement user interface (UI) functionality and logic using React features like state management, hooks, and server-side rendering.\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Integrate front-end components with back-end services using APIs (RESTful or GraphQL).\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Troubleshoot and debug complex web application issues\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Stay up-to-date on the latest advancements in React, web development best practices, Core Web Vitals, and accessibility guidelines.\u003C/p>\u003C/li>\u003C/ul>\u003Cp style=\"min-height:1.5em\">\u003C/p>\u003Cp style=\"min-height:1.5em\">\u003Cstrong>Who You Are:\u003C/strong>\u003C/p>\u003Cul style=\"min-height:1.5em\">\u003Cli>\u003Cp style=\"min-height:1.5em\">A degree in Computer Science or equivalent experience\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">5+ years of web development with an emphasis on frontend\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Desire to take on and own a large scale product with freedom to design and develop a best in class product\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Proven ability to develop and implement algorithms or systems in a professional setting, with strong coding skills in Javascript and strong a web technologies skillset\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Highly proactive, with a track record of building processes from scratch and a willingness to challenge traditional risk management paradigms.\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Comfortable in fast-paced, ambiguous environments, thriving on innovation and the challenge of creating something new.\u003C/p>\u003C/li>\u003C/ul>\u003Cp style=\"min-height:1.5em\">\u003C/p>\u003Cp style=\"min-height:1.5em\">\u003Cstrong>What We Offer:\u003C/strong>\u003C/p>\u003Cul style=\"min-height:1.5em\">\u003Cli>\u003Cp style=\"min-height:1.5em\">A salary range of $150,000 to $235,000 USD, based on experience, plus benefits including Medical, Dental, PTO, and 401k.\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">A small, impactful team environment where you can truly make a difference.\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">The opportunity to be at the forefront of transforming the sports betting and DFS landscape.\u003C/p>\u003C/li>\u003Cli>\u003Cp style=\"min-height:1.5em\">Support for professional growth with a company backed by leading investors.\u003C/p>\u003C/li>\u003C/ul>\u003Cp style=\"min-height:1.5em\">\u003C/p>\u003Ch3>\u003Cstrong>Our Hiring Philosophy\u003C/strong>\u003C/h3>\u003Cp style=\"min-height:1.5em\">Sleeper believes in quality over quantity, and intentionally keeps our team small as a result. In past roles, we found it very hard to make a big impact when companies grow too large in size, which has a detrimental effect on the product and the impact any single individual can have. Our team includes designers, engineers, product experts, and finance & operation focused on one thing — connecting people over sports. We believe in fair and equitable pay. Certain locations in the United States require job postings to include a reasonable estimate of the base salary range and/or a general description of benefits and other compensation applicable to the role.\u003Cbr />\u003C/p>\u003Cp style=\"min-height:1.5em\">Competitive salary plus benefits including Medical, Dental, PTO, 401k. Please note that The salary range for this role ($150,000 to $235,000 per year salary) takes into account a wide range of factors that are considered in making compensation decisions including, but not limited to, skill sets; experience and training; licensure and certifications; and other business and organizational needs. The policy of Sleeper is to provide equal employment opportunities to all applicants and employees without regard to race, color, creed, religion, sex, sexual orientation, gender identity, marital status, citizenship status, age, national origin, ancestry, disability, veteran status, or any other legally protected status and to affirmatively seek to advance the principles of equal employment opportunity. Sleeper is committed to being an Equal Opportunity Employer and offers opportunities to all job seekers, including job seekers with disabilities. If you are a qualified individual with a disability or a disabled veteran, you may request a reasonable accommodation if you are unable or limited in your ability to use or access the Company’s career webpage as a result of your disability. You may request reasonable accommodations by sending an email to jobs@sleeper.app.\u003Cbr />\u003Cbr />Headquartered in Las Vegas, NV, Sleeper is backed by Silicon Valley’s top investors, including Andreessen Horowitz, General Catalyst, and Expa.\u003C/p>\u003Cp style=\"min-height:1.5em\">\u003Cbr />To learn more, visit us online at:\u003Ca target=\"_blank\" rel=\"noopener noreferrer nofollow\" href=\"http://www.sleeper.com\"> \u003Cu>www.sleeper.com\u003C/u>\u003C/a>\u003C/p>\u003Cp style=\"min-height:1.5em\">\u003C/p>","https://jobs.ashbyhq.com/sleeper/e5e1bdbf-da55-4226-84e4-624be3964b06",{"id":50,"name":51,"urlSafeSlug":51,"logo":52},[578],{"city":21,"region":21,"country":27},"2025-09-25T09:37:14.46Z","Candidates should possess a degree in Computer Science or equivalent experience, with over 5 years of web development experience focused on the frontend. A strong command of Javascript and web technologies, along with proven ability to develop and implement algorithms or systems professionally, is essential. The ideal candidate is highly proactive, comfortable in fast-paced and ambiguous environments, and eager to own and develop a large-scale product.","The Senior Frontend Web Engineer will collaborate with designers to translate user requirements into technical specifications for the React web application. Responsibilities include writing clean, maintainable code using React, JS, and related libraries like Tailwind, React Query, and NextJS. The role involves developing reusable UI components, implementing UI functionality and logic with React features, and integrating front-end components with back-end services via APIs. This position also requires troubleshooting and debugging complex issues, and staying current with advancements in React, web development best practices, Core Web Vitals, and accessibility guidelines.",{"employment":583,"compensation":585,"experience":586,"visaSponsorship":591,"location":592,"skills":593,"industries":609},{"type":584},{"id":97,"name":98,"description":471},{"minAnnualSalary":21,"maxAnnualSalary":21,"currency":21,"details":21},{"experienceLevels":587},[588,590],{"id":364,"name":365,"description":589},"Bring extensive experience to lead projects and mentor others.",{"id":531,"name":532,"description":533},{"type":11},{"type":11},[594,595,596,597,598,599,600,601,602,603,604,605,606,607,608],"React","TypeScript","Webpack","Tailwind","React Query","NextJS","JavaScript","UI Development","API Integration","RESTful APIs","GraphQL","State Management","Hooks","Server-Side Rendering","Debugging",[610,611,612],{"id":278,"name":381},{"id":49,"name":48},{"id":278,"name":328},["Reactive",614],{"$ssite-config":615},{"env":616,"name":617,"url":618},"production","nuxt-app","https://jobo.world",["Set"],["ShallowReactive",621],{"company-Sleeper":-1,"company-jobs-725835de-2c43-4cb3-818e-ff61b32d4bef-carousel":-1},"/company/Sleeper",{}]