Principal Data Scientist, User Ecosystem
Core
Define measurement, modeling, and experimentation strategy for major consumer questions regarding user discovery, habits, engagement, and ecosystem health on Reddit.
Role type
Principal data scientist (consumer science & ecosystem modeling)
Builds
Durable analytical systems, measurement frameworks, and scientific direction for consumer products
Domain
Social media / Consumer internet / User behavior
Deliverable
production ML models
Required skills
Causal inference, Experimentation design, User modeling, Recommender systems, Knowledge graphs, Deep learning (PyTorch/JAX), Representation learning, Sequential modeling, Statistical analysis, Product strategy
Preferred skills
Long-term consumer measurement, Ecosystem risk analysis, Mentoring senior scientists
Technologies
PyTorch, JAX
Responsibilities
Set scientific direction for high-impact consumer problems; Build models representing users, content, and communities over time; Determine measurement systems for consumer and ecosystem health; Steer experimentation strategy to distinguish durable improvement; Translate technical findings into product decisions; Mentor data science organization
Seniority
Principal, strategy & mentorship
