Reddit is a community of communities. Every day, Reddit users submit, vote, and comment on the topics they care most about. With 100,000+ active communities and approximately 130 million daily active unique visitors, Reddit is one of the internet’s largest sources of information. Reddit’s Ads Data Science team is looking for a highly experienced Staff Data Scientist to advance the intelligence powering the advertiser experience on Reddit. In this role, you'll take deep ownership of a high-impact problem space within advertising, specializing in measurement, identity, and signal quality.

This is a high-impact, high-autonomy role where you'll influence strategic direction, set a high technical bar, and drive cross-functional initiatives across one or more critical focus areas in the Ads organization.

Innovate experimental design and develop infrastructure that supports large-scale, high-velocity, low-bias testing for advertisers.

Maximize Signal for Predictive Performance:





You will mathematically quantify the value of these signals and work with modeling teams to incorporate them into predictive models, directly improving bidding efficiency and ROAS.

Lead Through Cross-Functional and Technical Influence:

Set a high technical bar by mentoring others and championing best practices across modeling, experimentation, and measurement.

in Statistics, Mathematics, Physics, Economics, or Operations Research

S. holders: 10+ years of industry experience in applied science or data science roles

D. holders: 6+ years of industry experience in applied science or data science roles

Advanced proficiency in statistical programming (Python or R) and SQL.

Experience with machine learning or optimization techniques

Robust understanding of experimental design, causal inference, or A/B testing methodologies

📌 Assistant Data-Scientist - Machine Learning H/F (Toronto)
🏢 EngineersOfAI
📍 Toronto