Top Tech Jobs & Startup Jobs

Build and own backend systems for fantasy sports, including leagues, rosters, drafts, waivers, trades, matchups, and scoring. Scale real-time stat ingestion and low-latency delivery to millions of users. Ship features end to end with product, design, mobile, and web teams. Maintain production health through monitoring, profiling, and capacity planning. Staff engineers additionally own architecture, conduct reviews, and mentor engineers.

Build and own backend systems for Sleeper Picks, including contests, pricing, market data, settlement, wallets, ledgers, eligibility, and compliance. Develop reliable real-time systems handling high traffic, concurrent writes, financial correctness, reconciliation, and third-party integrations. Partner with risk, trading, design, and mobile/web teams to deliver end-to-end features. Staff engineers additionally own architecture, elevate engineering standards, and mentor peers.

Develop and enhance Sleeper’s React Native fantasy sports mobile application using TypeScript and related libraries. Responsibilities include building reusable UI components, integrating RESTful or GraphQL APIs, troubleshooting performance, socket, caching, and data issues, and delivering scalable, accessible, high-quality features in a large codebase. Collaborate with designers and contribute to technical specifications, best practices, and product improvements serving millions of users.

Develop and own scalable, high-performance web experiences for Sleeper’s fantasy sports platform. Build responsive interfaces with React and TypeScript, emphasizing animation, gestures, accessibility, and reusable components. Integrate APIs, troubleshoot performance, socket, and caching issues, and collaborate with designers on product requirements. The role supports a large consumer application serving millions of users and offers significant ownership over product and technical decisions.

Conduct quantitative and qualitative UX research to understand user needs and inform product decisions. Apply statistics and experimentation principles, collaborate cross-functionally with design, engineering, and product teams, and work effectively in a fast-paced environment. Experience with analytics dashboards, remote testing, and survey tools is beneficial. The role is based in San Francisco.

Design intern creating experiences across iOS, Android, web, and tablet platforms. Responsibilities include collaborating in ideation sessions, incorporating feedback and mentorship, producing high-fidelity mockups and prototypes, executing pixel-perfect designs for engineering, and contributing to the design system. Candidates should demonstrate strong design fundamentals, attention to detail, cross-functional collaboration, and a portfolio showing passion for design.

Analyze product and business requirements across mobile, web, email, and in-app systems. Translate requirements into system and interface specifications, reusable components, data structures, prototypes, and implementation guidance. Collaborate with Product, Marketing, Data, Design, and Engineering to evaluate feasibility, validate implementations, review accessibility and responsiveness, and identify defects or improvement opportunities.

Design user interfaces for iOS, Android, and web platforms, including layouts, typography, color systems, icons, illustrations, and digital assets. Create promotional and social media graphics, maintain the design system and component library, prepare production-ready assets, and collaborate with Product, Engineering, and multidisciplinary teams through visual design initiatives and critiques.

Support research projects, synthesize findings, monitor user engagement, conduct competitor benchmarking, and participate in UX quality assurance reviews.

Design user experiences for multiple platforms while mentoring junior designers, collaborating with teams, and contributing to a design system.