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  <jobs>
    <job>
      <externalid>779cd718-611</externalid>
      <Title>Principal Data Scientist, Ads</Title>
      <Description><![CDATA[<p>We&#39;re seeking a highly motivated Principal Data Scientist to drive the strategic application of advanced quantitative methods across our advertising platform.</p>
<p>In this pivotal leadership role, you will define and implement the next generation of foundational data science solutions, leveraging expertise in statistics, econometrics, machine learning, and other quantitative methods to optimize Reddit&#39;s Ads marketplace.</p>
<p>As a thought leader, you will champion scientific rigor, causal inference, and economic modeling, while providing deep mentorship to the broader team.</p>
<p>Key responsibilities include:</p>
<ul>
<li>Defining the future of Ads Data Science and owning the design and long-term evolution of our core Ads Data Science solutions and infrastructure</li>
<li>Identifying fundamental gaps and opportunities in our current systems and leading the strategic design and scientific roadmap for new solutions</li>
<li>Taking end-to-end ownership of complex problem domains such as full funnel acceleration, advertiser lifetime value (LTV), and developing advanced predictive and causal frameworks</li>
<li>Establishing scientific standards and defining best practices for large-scale statistical modeling, economic analysis, causal inference, offline model evaluation, and A/B experimentation</li>
</ul>
<p>Requirements include:</p>
<ul>
<li>Demonstrated expertise in at least one of the following: ads marketplace understanding, auctioning/bidding, ads creative &amp; format evaluation, measurement &amp; experimentation at scale</li>
<li>Master&#39;s or Ph.D. in Economics, Statistics, Computer Science, Operations Research, or a related quantitative discipline</li>
<li>Advanced proficiency in statistical programming (Python or R) and SQL</li>
<li>Experience with statistical analysis, economic modeling, foundational machine learning and/or optimization techniques</li>
<li>Strong understanding of experimental design, causal inference, or A/B testing methodologies</li>
</ul>
<p>Benefits include comprehensive healthcare benefits, income replacement programs, 401k with employer match, global benefit programs, family planning support, gender-affirming care, mental health &amp; coaching benefits, flexible vacation &amp; paid volunteer time off, and generous paid parental leave.</p>
<p>The base salary range for this position is $268,000-$365,100 USD.</p>
<p style="margin-top:24px;font-size:13px;color:#666;">XML job scraping automation by <a href="https://yubhub.co">YubHub</a></p>]]></Description>
      <Jobtype>full-time</Jobtype>
      <Experiencelevel>senior</Experiencelevel>
      <Workarrangement>remote</Workarrangement>
      <Salaryrange>$268,000-$365,100 USD</Salaryrange>
      <Skills>ads marketplace understanding, auctioning/bidding, ads creative &amp; format evaluation, measurement &amp; experimentation at scale, statistical programming (Python or R), SQL, statistical analysis, economic modeling, foundational machine learning, optimization techniques, experimental design, causal inference, A/B testing methodologies</Skills>
      <Category>Engineering</Category>
      <Industry>Technology</Industry>
      <Employername>Reddit</Employername>
      <Employerlogo>https://logos.yubhub.co/redditinc.com.png</Employerlogo>
      <Employerdescription>Reddit is a community-driven platform with over 121 million daily active unique visitors, featuring over 100,000 active communities.</Employerdescription>
      <Employerwebsite>https://www.redditinc.com</Employerwebsite>
      <Compensationcurrency></Compensationcurrency>
      <Compensationmin></Compensationmin>
      <Compensationmax></Compensationmax>
      <Applyto>https://job-boards.greenhouse.io/reddit/jobs/7330347</Applyto>
      <Location>Remote - United States</Location>
      <Country></Country>
      <Postedate>2026-04-18</Postedate>
    </job>
  </jobs>
</source>