Top Tech Jobs & Startup Jobs in San Francisco Bay Area, CA

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.

The Staff Software Engineer - Backend will design and build core backend systems, optimize performance, lead initiatives, and mentor team members in a remote-friendly role.

The Senior Software Engineer - Backend will design and build scalable backend systems for fantasy sports, enhance performance, and collaborate with cross-functional teams to optimize solutions for millions of users.

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

Design experiences across platforms, collaborate with teams, own design execution, and contribute to design system development while mentoring junior designers.

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

Lead zero-to-one lifecycle program: design and build onboarding, activation, retention, and reactivation journeys across Braze (push, email, in-app). Own segmentation, deliverability, experiments (holdouts/A/B), tentpole campaigns, and operating standards while partnering with product, design, data, and engineering.

As a content curator, you'll create and manage a sports community for a specific team, providing engaging content, responding to user queries, and ensuring a positive atmosphere within the Sleeper app.