Principal Data Scientist, User Ecosystem & Growth

Reddit, Inc.; San Francisco (CA); On-site; USD 313,000 - 365,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

401(k) with employer match

Generous vacation time

Parental leave

Job summary

Reddit, Inc. is seeking a very senior data science thought leader to shape measurement, modeling, and experimentation strategy for major consumer questions.

You will partner with product, engineering, research, and community teams to convert ambiguous problems into durable analytical systems that improve Reddit at scale. The role requires deep expertise in recommender systems, user modeling, and causal inference, with experience in PyTorch or JAX.

Qualifications

• Deep expertise in at least one relevant area with breadth across adjacent domains.
• Strong ability to model and optimize systems involving users, content, and communities.
• Excellent communication and ability to influence senior stakeholders.

Responsibilities

• Set the scientific direction for high-impact Consumer problems spanning discovery, relevance, personalization, user growth, retention, content, and communities.
• Build a durable understanding of users, their intent, needs, and behaviors that lead to lasting value.
• Develop models and frameworks that represent users, content, communities, and their relationships over time for use in scalable systems.
• Determine how to measure consumer and ecosystem health when objectives compete and short-term engagement may differ from long-term value.
• Set learning agendas and steer experimentation strategy to distinguish durable improvement from short-term metric movement.
• Build state-of-the-art measurement systems to evaluate heterogeneous effects across user personas, acquisition cohorts, platforms, content types, and community stages.
• Translate complex technical findings into clear product and business decisions.
• Develop exceptional scientists through mentoring and influencing DS org health and direction.

Skills

Recommender systems

Personalization

Causal inference

Experimentation

Deep learning

Cross-functional collaboration

Communication

Knowledge of user modeling

Tools

PyTorch

JAX

Job description

Reddit, Inc. is seeking a very senior data science thought leader to shape measurement, modeling, and experimentation strategy for major consumer questions.

You will partner with product, engineering, research, and community teams to convert ambiguous problems into durable analytical systems that improve Reddit at scale. The role requires deep expertise in recommender systems, user modeling, and causal inference, with experience in PyTorch or JAX.