Principal Data Scientist, User Ecosystem
$313K–$365K
Remote - United States · Remote · Principal · Full-time · Posted Oct 21, 2026
- Experience
- Significant experience; no number of years stated.
About the job
Sets scientific strategy and develops measurement, models, and experiments to understand and improve Reddit’s consumer ecosystem and long-term user value.
What you'll do
- Set scientific direction and build models for discovery, personalization, user growth, retention, content, and communities.
- Establish ecosystem-health measurement and experimentation strategies that distinguish lasting improvements from short-term metric changes.
- Translate findings into product and business decisions, while mentoring scientists and influencing data science direction.
What they ask for
- Deep expertise in at least one relevant consumer-science area and ability to work across adjacent domains.
- Advanced knowledge of modern machine-learning methods for behavioral and content data, including representation learning and sequential or contextual models; experience with PyTorch or JAX.
- Exceptional technical judgment across model design, validation, experimentation, and production tradeoffs.
- Significant experience applying data science, machine learning, statistics, experimentation, or causal inference to complex consumer products.
Pay
$313,000 — $365,100 USD (base salary)
Tools
PyTorch, JAX
Model-written summary · the original posting is authoritative