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Senior Data Scientist, Ads

Reddit

$190,800 - $267,100
Sep 12, 2025
Remote, US
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Reddit is looking to improve the adoption and performance of its advertising platform through data-driven insights.

Requirements

  • Strong understanding of statistical modeling, machine learning algorithms, causal inference and experimental design
  • Experience with large-scale data processing and analysis using tools such as Spark, Hadoop, or Hive; knowledge of BigQuery a plus
  • Proficiency in Python or R and experience with machine learning libraries such as scikit-learn, TensorFlow, or PyTorch
  • Experience with SQL and relational databases
  • Experience with online advertising and ad tech (bonus)
  • Experience with causal inference and A/B testing (bonus)
  • Contributions to open-source projects or publications in relevant conferences or journals (bonus)

Responsibilities

  • Design, develop, and apply DS solutions to inform improvements in advertiser experience as well as Reddit's ad platform & marketplace performance
  • Analyze large-scale datasets to identify trends, patterns, and insights that can be used to improve the effectiveness of our advertising platform
  • Develop ML models & DS methods to improve anomaly detection, prediction, & pattern recognition
  • Collaborate with product managers and engineers to define product requirements and translate them into data science solutions
  • Communicate findings and recommendations to stakeholders across the organization
  • Stay up-to-date on the latest advancements in machine learning and data science
  • Mentor and guide junior data scientists on the team

Other

  • MS or PhD in Computer Science, Statistics, Mathematics, or a related field
  • 5+ years of experience in data science, machine learning, or a related field
  • Excellent communication and presentation skills
  • Passion for Reddit and the online advertising industry
  • Comprehensive Healthcare Benefits
  • 401k Matching
  • Workspace benefits for your home office
  • Personal & Professional development funds
  • Family Planning Support
  • Flexible Vacation (please use them!) & Reddit Global Wellness Days
  • 4+ months paid Parental Leave
  • Paid Volunteer time off