or apply directly on Reddit's site. We never take the application ourselves.
Is this posting real?
- This role has been open
- 81 days Reddit's roles stay open a median of 81 days
- Reposted
- No
- Salary listed
- No 0% of Reddit's roles list one
- Ghost-job risk at Reddit
- high 148 stale, 3 reposted of 150 open
- Hiring momentum
- 259 roles opened in the last 90 days ↑ up vs. the prior 90 days
- Last confirmed on the employer's board
- 2026-10-23
Measured from postings appearing on and disappearing from Reddit's own greenhouse board since 2026-08-03. Full hiring picture for Reddit.
About this role
As a Principal Data Scientist on Reddit's Ads Data Science team, you will lead the development of advanced quantitative solutions to enhance the advertising platform. Your responsibilities include defining the strategic roadmap for data science applications, collaborating with cross-functional teams, and establishing scientific standards for modeling and experimentation. You will also mentor other data scientists and influence the organization’s technical direction.
- benefits
- 4/5
- freshness
- 1/5
- career value
- 5/5
- role clarity
- 5/5
- pay transparency
- 0/5
Scored from the posting itself — how clearly the role is described, how much it says about pay and benefits, and how recently it was listed. Not a judgement of Reddit as an employer.
What you need
- Demonstrated expertise in 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
- For M.S. holders: 12+ years of industry experience in applied science, data science, or machine learning engineering roles
- For Ph.D. holders: 8+ years of relevant experience in applied science, data science, or machine learning engineering roles
- Advanced proficiency in statistical programming (Python or R) and SQL
- Experience with statistical analysis, economic modeling, foundational machine learning and/or optimization techniques
What you get
- 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
- Gender-Affirming Care
- Mental Health & Coaching Benefits
Worth weighing
- Base salary range is $268,000 — $365,100 USD, which may vary based on skills and experience
- Interviews may be recorded and summarized by AI, with an option to opt out
- The role spans more than one career level, which may affect expectations and responsibilities
Summarised from Reddit's posting. Read the full original.
Listed by Reddit on their greenhouse job board, last confirmed open on 2026-10-23. PitchMeAI is not the employer.
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