Wikimedia Foundation

Data Scientist

• 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.
• People management for a team of roughly seven data scientists and nurturing a strongly collaborative and inclusive culture of trust, excellence, and empowerment.
• Mentoring team members on critical thinking, data-informed storytelling, technical skillset, and stakeholder partnership.
• Partnering with the Experiment Platform & Data Engineering teams to build and maintain data products that make data and insights accessible.
• Collaborating with product teams – especially product managers – and colleagues in the Research & Decision Science group to cultivate a practice of data-informed product development and decision making.
• Continuous development and improvement of experimentation and measurement best practices, product health metrics, visualizations, and reports for easier interpretation and increased accessibility.

Manager, Data Science – Product Analytics

Research Scientist

• Maintaining a fluent and real-time command of the global research landscape.
• Leading a strategic research portfolio on knowledge integrity.
• Mentoring individual contributors to execute high-impact scientific projects.
• Driving research advocacy and public engagement in knowledge integrity research.

Principal Research Scientist

DevOps Engineer

• Simplifying operations by standardizing service deployments
• Supporting users and removing roadblocks
• Monitoring systems, optimizing performance, and resource utilization
• Identifying instability sources in distributed systems
• Automating tasks and identifying process gaps
• Collaborating with a global team asynchronously
• Mentoring peers in technical and operational strength
• Traveling domestically or internationally 2-3 times a year for gatherings and conferences

Senior Site Reliability Engineer

Full-stack Engineer

• Helping design, develop, and deliver security features, with safety and security in mind
• Working with other engineering teams to ensure that they make safe and compliant architectural and implementation choices
• Leading by example in code review, decision-making, and team culture — fostering transparency, empathy, and collaboration
• Developing, reviewing, and deploying security features developed by the Foundation and community members
• Conducting internal and external security and privacy reviews
• Performing maintenance and addressing technical debt in security and privacy-critical components
• Providing support for application security and privacy incidents and operations

Senior Software Engineer, Privacy

Backend Engineer

• Assist editors, tool authors, researchers, and other reusers with updating their queries
• Identify impacted queries and help rewrite them
• Document new query patterns and ensure clarity
• Support the Wikidata community during the migration
• Update technical documentation to reflect backend changes

Wikidata Platform Backend Migration Specialist – Contract

Engineering Manager

• Addresses issues of diverse scope where analysis of situation or data requires evaluation of a variety of factors, including an understanding of Foundation priorities & current business trends
• Lead timely, high-quality engineering delivery for WDQS and related query platform services, including large-scale platform or data migrations involving multiple teams and stakeholders
• Ensure reliability, performance, and sustainability of existing and future query infrastructure
• Oversee planning activities including estimation, resource allocation, and work break-down, and balance roadmap work with maintenance needs
• Triage incoming issues, bugs, and operational incidents
• Develop and drive long-term engineering strategy for WDQS, including lifecycle management, architectural tradeoffs, and future planning
• Partner with SRE and other Foundation teams to ensure operational excellence and alignment across the data ecosystem
• Safeguard privacy, security, and data integrity across query services
• Provide technical input on system design, complexity, estimates, and feasibility
• Hire, onboard, mentor, and support the professional growth and performance of engineers on the Wikidata Platform team
• Foster a collaborative, inclusive, and psychologically safe culture
• Ensure healthy team processes and rituals, time management, and sustainable on-call practices
• Partner closely with the Product and Tech Leads to define roadmaps, priorities, work scopes, and deliver impactful outcomes
• Proactive dependency management—staying on top of the teams we depend on and the teams that depend on us
• Maintain strong, productive collaboration with Wikimedia Deutschland (WMDE) product and engineering counterparts
• Communicate technical plans, risks, and progress clearly to internal teams, leadership, and external stakeholders.

Engineering Manager, Wikidata Platform

• Producing descriptive analyses of human traffic patterns, referrers, and indicators of traffic stability over time.
• Supporting preliminary assessments of how traffic sources relate to on-wiki engagement (e.g., likelihood of exploring additional pages or initiating contribution).
• Assisting in analyses of cases where sudden changes in visibility allow us to study downstream impacts on editing activity or content quality.
• Cleaning and joining datasets, creating summary tables, and developing Jupyter notebooks supporting analyses.
• Conducting time-series analyses for Traffic Health indicators and content reusers.
• Performing natural experiment analyses with interpretable visuals and written summaries.
• Documenting methods describing assumptions, data limitations, and analytical decisions.
• Creating short briefs or memos explaining key findings for internal stakeholders.
• Providing clear handover materials enabling reproducibility.

Senior Data Scientist – Contract

• Identifying and executing on opportunities that have area/group-wide impact
• Proactively identifying and helping to refocus team's efforts when projects are off-course or not technically feasible and results aren’t moving the needle for our business/team goals
• Designing scalable systems that work complementary to already existing ones and carve a path for easy migrations
• Mentoring and supporting less experienced developers on technical and delivery challenges
• Leading the architectural design of new services and making them operate at scale
• Incident response, diagnosis and follow-up on system outages or alerts across Wikimedia Enterprise’s production infrastructure
• Sharing our values and work in accordance with them