# Senior Staff Data Scientist - Ads Measurement, Signals, Privacy

**Company:** [Reddit](https://hotfix.jobs/companies/reddit)
**Location:** Remote
**Role:** Data Science
**Experience:** 10+ years
**Skills:** SQL, Python, R, Statistical Modeling, Experimental Design, Causal Inference, Attribution, Ads Measurement, Conversion Modeling, Identity Resolution, Signal Quality, Privacy-Preserving Modeling, Machine Learning, Ranking, Bidding
**Posted:** 2026-08-14

> Leads the scientific strategy for Reddit’s ads measurement, signal, identity, attribution, and privacy systems. The role requires deep expertise in experimentation and causal inference, 10+ years of quantitative industry experience, and the ability to influence senior cross-functional leaders while mentoring data science teams.

## Job Description

## Responsibilities

- Define the long-term data science vision and strategy for ads measurement, signal quality, identity, attribution, and privacy.
- Establish frameworks for evaluating advertiser value, measurement quality, and signal utility across first-party and third-party products.
- Create rigorous frameworks for validating lift, attribution, identity quality, modeled conversions, signal-loss recovery, and privacy-aware measurement.
- Define ground truth, objective functions, quality metrics, guardrails, and decision frameworks for product and engineering investments.
- Lead the evolution of experimentation and lift methodologies, including Brand Lift, Conversion Lift, Split Testing, and emerging measurement products.
- Improve study quality, reduce bias and contamination, and develop scalable diagnostics for experiment health, feasibility, and interpretability.
- Partner with Ads Engineering to operationalize causal models in performant, scalable, and resilient production systems.
- Quantify how signal quality, match rates, identity resolution, modeled conversions, and privacy changes affect bidding efficiency, CPA, ROAS, and advertiser outcomes.
- Partner with modeling and ranking teams to translate measurement improvements into performance gains.
- Lead a privacy-first measurement strategy using compliant modeling to recover signal utility.
- Define reusable methodologies, dashboards, scorecards, quality metrics, and best practices across the organization.
- Build repeatable systems for evaluating launches, monitoring regressions, sizing opportunities, and communicating impact.
- Partner with Product, Engineering, Sales, Marketing Science, Legal/Privacy, and Ads leadership to shape roadmap decisions.
- Mentor Staff and Senior Data Scientists and raise technical standards across the Ads Data Science organization.

## Requirements

- Advanced degree in Statistics, Economics, Mathematics, Computer Science, Operations Research, Physics, or a related quantitative field, or equivalent industry experience.
- 10+ years of industry experience in data science, applied science, economics, statistics, or a related quantitative role.
- Deep expertise in ads measurement, experimentation, causal inference, attribution, marketplace measurement, or ads optimization.
- Experience leading ambiguous, cross-functional, multi-pillar problem spaces with measurable business impact.
- Strong command of statistical modeling, experimental design, causal inference, and measurement methodology.
- Experience defining metrics, evaluation frameworks, quality guardrails, and decision systems for complex products.
- Ability to balance long-term strategic vision with hands-on execution of complex technical ideas.
- Advanced proficiency in SQL and Python or R.
- Ability to influence senior product, engineering, and business leaders through clear technical judgment and communication.
- Experience mentoring senior individual contributors and improving technical standards across a data science organization.
- Ability to adopt AI tools to amplify personal output and turn complex methodologies into working prototypes.

## Nice-to-haves

- Experience with ads identity, conversion modeling, signal loss, modeled conversions, match-rate optimization, or identity graph evaluation.
- Experience with lift measurement, brand lift, conversion lift, incrementality testing, MMM, MTA, or third-party measurement partnerships.
- Experience with privacy-constrained measurement, clean rooms, aggregation, consent-aware systems, or privacy-preserving modeling.
- Experience partnering with ranking, bidding, or machine learning teams to connect measurement quality to optimization outcomes.
- Familiarity with two-sided marketplaces, auction systems, performance advertising, or advertiser-facing measurement products.
- Experience building internal frameworks, training programs, scorecards, or methodology standards adopted across an organization.

## Benefits

- Global benefit programs supporting workspace, professional development, and caregiving.
- Family planning support.
- Gender-affirming care.
- Mental health and coaching benefits.
- Comprehensive medical benefits and a health care spending account.
- Registered Retirement Savings Plan with matching contributions.
- Income replacement programs.
- Flexible vacation and paid volunteer time off.
- Paid parental leave.

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