Principal Data Scientist, Ads

Reddit Inc.

Job Overview

Location

Remote - United States

Job Type

Full-time

Full Job Description

📋 Description

• As a Principal Data Scientist on Reddit's Ads team, you will drive the strategic application of advanced quantitative methods to optimize the advertising platform and advance the intelligence powering the advertiser experience.
• You will define and implement the next generation of foundational data science solutions, lead the scientific roadmap for Ads marketplace optimization, and partner with Analytics Engineering, Product, Engineering, and Business leaders to establish long-term vision for measurement, prediction, and optimization.
• Reddit is a community of communities with 100,000+ active communities and approximately 126 million daily active unique visitors, making it one of the internet’s largest sources of information, built on shared interests, passion, and trust.
• You will champion scientific rigor, causal inference, and economic modeling while providing deep mentorship to the broader team, influencing technical and statistical direction across the product and engineering organization and translating ambiguity into tangible business outcomes.

🎯 Requirements

• Demonstrated expertise in at least one of the following: ads marketplace understanding, auctioning/bidding, ads creative & format evaluation, measurement & experimentation at scale
• Master's or Ph.D. in Economics, Statistics, Computer Science, Operations Research, or a related quantitative discipline
• Advanced proficiency in statistical programming (Python or R) and SQL, with experience in statistical analysis, economic modeling, foundational machine learning and/or optimization techniques
• Strong understanding of experimental design, causal inference, or A/B testing methodologies
• Exceptional problem-solving and communication skills, with a track record of influencing product and engineering partners
• Proven experience in influencing large (500+ engineers/data scientists) organizations on technical direction, statistical rigor, and machine learning best practice

🏖️ Benefits

• Comprehensive Healthcare Benefits and Income Replacement Programs
• 401k with Employer Match
• Global Benefit programs that fit your lifestyle, from workspace to professional development to caregiving support
• Family Planning Support and Gender-Affirming Care
• Mental Health & Coaching Benefits
• Flexible Vacation & Paid Volunteer Time Off
• Generous Paid Parental Leave

Skills & Technologies

Python

Data Science

Senior

Remote

Degree Required

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Reddit Inc.

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About Reddit Inc.

Reddit is a social media platform where users submit, vote, and comment on content organized into topic-based communities called subreddits. Founded in 2005, it offers forums for news, hobbies, advice, and discussion, enabling real-time conversations and content ranking through upvotes and downvotes. With millions of daily active users globally, Reddit hosts diverse communities moderated by volunteers, supports multimedia posts, and provides advertising and premium membership options. The platform emphasizes user anonymity, community governance, and crowdsourced information, making it a hub for niche interests, viral content, and public discourse. Reddit went public in 2024 and is headquartered in San Francisco.

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