Stephan Porz

Data Scientist @eyeo

Cologne, DE

Contributed over a decade to building, scaling, and safeguarding the company’s data systems and culture. Balanced privacy, business impact, and long-term sustainability across diverse stakeholder needs.Key responsibilities and achievements- Reliable analytics & infrastructure: Built and maintained core reporting pipelines (e.g, monthly active users) supporting long-term audit-readiness and billing accuracy. Focused on maintainability, reproducibility, and cost-efficiency- Investigative data work: Diagnosed and resolved complex data anomalies through deep-dive analyses, explorative dashboards, and structured collaboration across product and engineering- Privacy-aware innovation: Developed privacy-preserving algorithms (e.g, differential privacy in Crumbs, on-client engagement metrics for Flattr, telemetry data minimization) to enable insights while respectingusers choices- Automation and scalability: Co-led migrations from on-premise systems to fully cloud-based data platforms in multiple iterations; designed low-maintenance pipelines supporting company-wide data flows- Internal enablement: Created self-service dashboards and documented methodologies to empower teams across the company; provided responsive ad-hoc support and stakeholder consulting- Collaboration & cultural contribution: Actively shaped team processes via meeting facilitation, retrospectives, coaching, documentation reviews, and trust-building communication- Cross-functional communication: Translated between technical teams and business stakeholders; guided methodological decisions and created clarity in ambiguity.

The University of Bonn

Diploma, Physics

Megina Gymnasium Mayen

A-Levels, physics, mathematics