Senior Data Scientist, Personalization
Fiserv
2021 - Present
- Led recommendation ranking improvements that increased weekly watch-time engagement by 11.8% across target cohorts.
- Built near-real-time feature pipelines for personalization models, reducing model freshness lag from 24 hours to under 90 minutes.
- Designed and standardized experimentation guardrail metrics adopted by 7 cross-functional product pods.
- Mentored 4 data scientists and drove review standards for modeling, offline evaluation, and launch readiness.