Senior Ads Data Scientist: Measurement, Signals & Privacy

Leyla; Toronto; On-site; CAD 180,000 - 240,000; Full time

Benefits offered by this job

Global benefits

Family planning support

Mental health & coaching

Medical benefits

Job summary

Reddit is seeking a Senior Staff Data Scientist to lead the scientific strategy behind ads measurement and signal systems. This role centers on proving advertiser value, improving signal quality, and building privacy-aware measurement for impactful outcomes.

You will architect the next generation of measurement, drive experimental design at scale, and mentor teams across product and engineering to shape the future of ads data science.

Qualifications

• Advanced degree or equivalent experience in a quantitative field.
• 10+ years in data science or related quantitative roles.
• Deep expertise in ads measurement, experimentation, and causal inference.
• Proven ability to lead complex, cross-functional problems with business impact.
• Strong skills in metrics, evaluation frameworks and decision systems.

Responsibilities

• Define long-term vision for ads measurement, identity, attribution, and privacy.
• Lead cross-pillar measurement strategy and validate lift and attribution.
• Build frameworks for trusted measurement and evaluation.
• Advance experimentation, lift methodologies, and scalable diagnostics.
• Connect signals, identity and ranking outcomes to improve CPA/ROAS.
• Mentor senior data scientists and raise technical standards.

Skills

Statistical modeling

Experimental design

Causal inference

SQL

Python

R

Data storytelling

Education

Advanced degree in Statistics, Economics, Mathematics, CS or related field

Tools

SQL

Python

R

Job description

Reddit is seeking a Senior Staff Data Scientist to lead the scientific strategy behind ads measurement and signal systems. This role centers on proving advertiser value, improving signal quality, and building privacy-aware measurement for impactful outcomes.

You will architect the next generation of measurement, drive experimental design at scale, and mentor teams across product and engineering to shape the future of ads data science.