Senior Data Scientist, Safety & Security (Anti-Abuse)

Wikimedia Foundation; San Francisco, Northern (CA, KY); On-site; USD 110,000 - 173,000; Full time

Job summary

The Wikimedia Foundation is hiring a Senior Data Scientist to guide Wikipedia’s anti‑abuse and security strategy within the Product Analytics team. The role collaborates with product managers, engineers, and other teams to align features and interventions with impact.

Responsibilities include building measurement strategies, evaluating experiments, and delivering dashboards and data insights. The position supports remote collaboration with a strong emphasis on safety, security, and AI‑powered

Qualifications

• Experience with experimental design and statistics or machine learning methods.
• Experience using AI coding assistants for data analysis and other technical tasks.
• Fluency in R or Python, and common version control and command‑line‑based tools, for data analysis, statistical modeling, simulation, visualization, & reporting.
• Fluency in SQL and working with large scale data (we use tools like Hive, Presto, Druid, and Spark).
• Experience collaborating with product development teams in a fast‑paced environment to test, analyze, and evaluate user‑facing features for an online platform.

Responsibilities

• Serve as a strategic partner for product managers, engineers, designers, and other colleagues in product development teams.
• Proactively making recommendations on product direction and data strategy, surfacing insights and interpreting results.
• Timely delivery of accurate quantitative data and insights to inform strategy, guide product decisions, and assess the impact of product development work – balancing the need to operate in a fast‑changing environment with appropriate rigor.
• Clearly communicating results and data‑backed recommendations to stakeholders across different functions, ensuring understanding and guiding decision‑making.
• Building and executing measurement strategy, evaluating experiments using Bayesian & Frequentist approaches, and performing quantitative research to inform product decisions.
• Developing queries & code to work with large‑scale internal and external data repositories, using cutting‑edge AI assistants, and tools such as Apache Iceberg, Hive, Druid, Presto, and Spark.
• Building automated, self‑service dashboards for product teams that track success and health metrics using tools such as DBT, Airflow, and Superset.
• Helping product team members instrument features, perform data quality assurance, and use tools for running A/B tests.
• Demonstrating good judgment in prioritizing workload and selecting analytical methods and techniques.

Skills

Experimental design

ML/statistics

AI coding assistants

R or Python

SQL

Cross-functional collaboration

Tools

Apache Iceberg

Hive

Druid

Presto

Spark

DBT

Airflow

Superset

Job description

The Wikimedia Foundation is hiring a Senior Data Scientist to guide Wikipedia’s anti‑abuse and security strategy within the Product Analytics team. The role collaborates with product managers, engineers, and other teams to align features and interventions with impact.

Responsibilities include building measurement strategies, evaluating experiments, and delivering dashboards and data insights. The position supports remote collaboration with a strong emphasis on safety, security, and AI‑powered