Senior Data Scientist

• Traffic Health & Visibility Trends: Producing descriptive analyses of human traffic patterns, referrers, and indicators of traffic stability over time
• Engagement & Attribution Exploration: Supporting preliminary assessments of how traffic sources relate to on-wiki engagement (e.g., likelihood of exploring additional pages or initiating contribution)
• Natural Experiments & Content Quality: Assisting in analyses of cases where sudden changes in visibility allow us to study downstream impacts on editing activity or content quality

• Advanced SQL (large-scale distributed datasets)
• Python expertise (pandas, numpy, statsmodels, scikit-learn, Jupyter)
• Ability to work collaboratively in GitLab repositories
• Time-series modeling experience
• Applied causal inference (Diff-in-Diff, event studies, lag analysis)
• Experience working with log-level or large behavioral datasets
• Ability to evaluate data feasibility and design methodological approaches
• Ability to interpret and communicate analytical uncertainty
• Strong documentation practices and reproducibility mindset
• Ability to work independently in a fast-moving, ambiguous research environment
• Strong communication with non-technical stakeholders
• Ability to manage competing priorities across multiple research modules
• 6+ years of professional experience working in data science or quantitative analysis roles
• Master’s degree or PhD in a quantitative field (e.g., statistics, economics, computer science, mathematics, data science, or similar)
• Are you advanced in SQL, including writing complex queries over large, distributed datasets?
• Do you have hands-on experience using Python for data analysis (e.g., pandas, numpy, statsmodels, scikit-learn, Jupyter notebooks)?
• Are you legally authorized to work in the country which you reside?
• Will you require sponsorship to work in the country with which you reside now or in the future?
• Please note that sponsorship is not allowed for this role. Also, if you are an international candidate, please confirm that your work authorization allows you to work as an independent contractor or your own business entity. Please confirm your knowledge of this by selecting 'Yes'.
• Please note this role is a contract position. Contract roles are not eligible for benefits outside of the required, local statutory benefits (as applicable). Please confirm your knowledge of this by selecting 'Yes'.
• Are you considered a business entity?

Knowledge of the Wikimedia movement and ecosystem a plus