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Principal Data Scientist, Ads

RedditRemote - United StatesAds Data Science
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Salary
Not listed
Job type
Full-time
Work mode
Remote
Posted
14 Oct 2025
Status
Open · checked 7d ago

About this role

Reddit is seeking a remote Principal Data Scientist for the Ads Data Science team to drive the strategic application of advanced quantitative methods across the advertising platform. This leadership role is well-suited for an experienced professional passionate about solving complex business problems and shaping the future of advertising intelligence from anywhere in the United States.

Role Overview

As a Principal Data Scientist for Ads, the individual will define and implement the next generation of foundational data science solutions to optimize the advertising marketplace. The position centers on leveraging expertise in statistics, econometrics, and machine learning to advance the advertiser experience. The role requires partnering closely with Analytics Engineering to uplevel underlying data systems and collaborating directly with Product, Engineering, and Business leaders to set long-term measurement and optimization visions.

Key Responsibilities

Design and guide the long-term evolution of core Ads Data Science solutions, infrastructure, and scientific roadmaps.
Identify systemic gaps and build solutions that elevate advertiser ROI, user experience, and revenue growth.
Own complex problem domains including full-funnel acceleration, advertiser lifetime value, and advanced predictive frameworks.
Establish and codify scientific standards for large-scale statistical modeling, causal inference, economic analysis, and A/B experimentation.
Serve as a domain authority for technical peers and mentor senior data scientists across the organization.
Influence technical direction, statistical rigor, and machine learning best practices within large engineering and data science teams.

Requirements

Demonstrated expertise in ads marketplace understanding, auctioning and bidding, ad creative evaluation, or large-scale measurement and experimentation.
Holds either a Master's degree with 12 plus years of industry experience or a Ph.D. with 8 plus years of relevant experience in Economics, Statistics, Computer Science, Operations Research, or a related quantitative discipline.
Advanced proficiency in statistical programming languages such as Python or R, alongside SQL.
Strong background in economic modeling, foundational machine learning, optimization techniques, experimental design, and causal inference.
Exceptional problem-solving and communication skills with a history of influencing cross-functional engineering and product partners.

Nice to Have

Experience working within fast-paced, ambiguous environments.
Proven track record of guiding technical direction in organizations with over 500 engineers or data scientists.

Skills and Tools

Python
SQL
R
Statistical Modeling
Econometrics
Machine Learning
Causal Inference
A/B Testing and Experimental Design
Optimization Techniques

Salary and Benefits

Base salary range of $268,000 to $365,100 USD, with final offers determined by factors such as skills, depth of experience, and credentials.
Eligibility to receive equity in the form of restricted stock units and potential commissions depending on the position.
Comprehensive healthcare benefits, income replacement programs, and a 401(k) program with an employer match.
Global benefit programs covering workspace needs, professional development, and caregiving support.
Family planning support, gender-affirming care, mental health and coaching benefits.
Flexible vacation, paid volunteer time off, and generous paid parental leave.

About the Company

Reddit is a community of communities built on shared interests, passions, and trust, featuring over 100,000 active communities and approximately 130 million daily active unique visitors. As one of the largest sources of information on the internet, the company fosters authentic conversations and values diversity as an equal opportunity employer.

How to Apply

Candidates interested in this opportunity should visit the official Reddit careers page to submit an application.

Skills and tech stack

PythonSQL

Questions candidates ask

What is the location for the Principal Data Scientist, Ads role?

The position is remote and based in the United States.

What is the salary range for this position?

The base salary range is between $268,000 and $365,100 USD, with additional eligibility for equity and potential commissions.

What educational qualifications are required?

Candidates must hold a Master's degree with 12+ years of industry experience, or a Ph.D. with 8+ years of relevant experience, in Economics, Statistics, Computer Science, Operations Research, or a related quantitative discipline.

What programming languages are required?

Advanced proficiency in statistical programming languages such as Python or R, along with SQL, is required.

What benefits are offered to U.S.-based employees?

Benefits include comprehensive healthcare, a 401(k) with employer match, flexible vacation, paid parental leave, mental health benefits, and family planning support.

Ready to apply?

The application is on the official Reddit careers page.

Apply on company site