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Principal Data Scientist, Ads

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Company

Reddit

Location

Remote - United States

Status

Open

Posted

2025-10-14T20:40:47+00:00

Reddit's Ads Data Science team is hiring a Principal Data Scientist to lead quantitative work across its advertising platform, covering auction and targeting systems, advertiser lifetime value, and full-funnel relevance models. The role owns the scientific roadmap and standards for statistical modeling, causal inference, economic modeling, offline evaluation, and A/B experimentation, and mentors senior data scientists while partnering with product and engineering leaders. It asks for a master's or PhD in a quantitative field with 12+ or 8+ years of experience respectively, plus Python or R, SQL, and a record of influencing large technical organizations.