# Staff Data Scientist, Ads

**Company:** [Reddit](https://hotfix.jobs/companies/reddit)
**Location:** Remote
**Role:** Data Science
**Salary:** $217k – $304k/yr
**Experience:** 6+ years
**Skills:** Python, R, SQL, Machine Learning, Causal Inference, A/B Testing, Probabilistic Models, Experimental Design, Statistical Modeling, Optimization
**Posted:** 2026-03-16

> Staff Data Scientist owns advertising measurement, identity resolution, and signal quality using advanced stats and ML. Requires advanced degree, 6-10+ years experience, ads expertise, Python/R/SQL proficiency.

## Job Description

## Responsibilities
- **Design the Future of Ads Identity**: Develop probabilistic models for identity resolution. Design methodology linking on-platform and off-platform actions while honoring privacy.
- **Advance Lift Methodologies & Experimentation**: Own statistical rigor for Brand and Conversion Lift products. Innovate experimental design and infrastructure for large-scale testing.
- **Maximize Signal for Predictive Performance**: Define strategy for new signal sources. Quantify value and incorporate into predictive models to improve bidding and ROAS.
- **Define Ground Truth & Evaluation Frameworks**: Design objective functions and truth sets for model training and impact measurement.
- **Lead Through Cross-Functional and Technical Influence**: Collaborate with engineering, product, and sales. Mentor and champion best practices.

## Qualifications
**Required:**
- Advanced degree (Master's or Ph.D.) in Statistics, Mathematics, Physics, Economics, or Operations Research
- For M.S.: 10+ years industry experience in applied/data science
- For Ph.D.: 6+ years industry experience in applied/data science
- Deep understanding of ads ecosystem
- Expertise in measurement & experimentation (lift/attribution), identity graph creation, or predictive modeling with signal loss
- Advanced proficiency in statistical programming (**Python** or **R**) and **SQL**
- Experience with **machine learning** or optimization techniques
- Strong understanding of experimental design, causal inference, or A/B testing
- Exceptional problem-solving, communication, and cross-functional collaboration skills

## Benefits
- Comprehensive Healthcare Benefits and Income Replacement Programs
- 401k with Employer Match
- Global Benefit programs
- Family Planning Support
- Gender-Affirming Care
- Mental Health & Coaching Benefits
- Flexible Vacation & Paid Volunteer Time Off
- Generous Paid Parental Leave

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