Petra Labs
Data Scientist
New York City · On-site · Full-time · Posted Sep 29, 2026
About the job
Conduct research on how consumer LLMs search and synthesize information, use experimentation and causal inference to guide product decisions, and build ongoing measurement systems that bring research findings into the product.
What you'll do
- Lead and publish rigorous research on consumer LLM behavior and frontier AEO/GEO research.
- Design and analyze experiments, including measurement approaches when clean A/B tests are not possible.
- Build data pipelines and recurring measurements to support product decisions and operationalize research findings.
What they ask for
- Expertise in Python and SQL.
- Strong statistical and experimentation foundations in experiment design, effect estimation, and evaluation metrics.
- Ability to work in early-stage, ambiguous environments while balancing speed and rigor.
- Clear written and verbal communication, with the ability to influence stakeholders using evidence.
Tools
Python, SQL
AI focus
Research how consumer LLMs search, reason, and synthesize sources; evaluate agent performance and model behavior; and make findings actionable through ongoing measurement and product development.
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