• Design, build, and operate backend services that power real-time, personalized user experiences across our streaming products • Own systems that translate behavioral data and ML outputs into in-session product logic, recommendations, and engagement features • Lead systems design in ambiguous or early-stage problem spaces, setting technical direction and making scalable architectural decisions • Build and evolve user segmentation and cohorting frameworks based on behavioral and trait data • Partner closely with data science and ML teams to productionize models into reliable backend services • Develop internal tools and platforms used by PMs, GTM, and business teams to understand and act on user data