Principal Data Scientist, Ads — Remote, Equity, Impact

Bazeta; United States; Remote; USD 180,000 - 280,000; Full time

Job summary

Reddit is seeking a Principal Data Scientist for Ads to lead strategic quantitative initiatives across the advertising platform. You will define long-term data science solutions, mentor the team, and collaborate with product, engineering, and business leaders to optimize advertiser ROI and user experience.

You will own the scientific roadmap, advance causal inference and economic modeling, and drive rigorous evaluation, A/B testing, and scalable modeling across the Ads ecosystem.

Qualifications

• Expertise in ads marketplace dynamics and measurement at scale.
• Strong background in statistical analysis, economic modeling, and causal inference.
• Proven ability to design and evaluate experiments (A/B) and optimization approaches.

Responsibilities

• Define the future of Ads Data Science and build scalable data solutions.
• Lead the scientific roadmap for improving advertiser ROI and user experience.
• Own end-to-end impact on modeling efforts, including LTV and full funnel metrics.
• Establish rigorous standards for modeling, offline evaluation, and experimentation.
• Mentor data scientists and collaborate with cross-functional partners.

Skills

Ads marketplace understanding

Auctioning/bidding

Measurement & experimentation at scale

Education

Master's or Ph.D. in Economics/Statistics/CS/OR

Tools

Python

SQL

R

Job description

Reddit is seeking a Principal Data Scientist for Ads to lead strategic quantitative initiatives across the advertising platform. You will define long-term data science solutions, mentor the team, and collaborate with product, engineering, and business leaders to optimize advertiser ROI and user experience.

You will own the scientific roadmap, advance causal inference and economic modeling, and drive rigorous evaluation, A/B testing, and scalable modeling across the Ads ecosystem.