Elena Varga
Boston, MA · elena.varga@example.com · (617) 555-0128 · linkedin.com/in/elenavarga-ds
Experience
Harborview Insurance · Senior Data Scientist, Claims
2023 – Present
- Built a gradient-boosted fraud triage model now scoring 4,000 claims a day; investigators recover $3.2M more a year with the same headcount.
- Designed a causal evaluation for a new adjuster workflow using difference-in-differences across 12 offices, settling a two-year internal debate.
- Own claims ML in production: feature store, weekly retraining, drift monitoring, and on-call.
- Lead a reading group and review modeling work for four data scientists.
Wayfare Travel · Data Scientist
2021 – 2023
- Shipped a LightGBM learning-to-rank hotel model that raised booking conversion 4.6% in testing.
- Replaced rule-based price alerts with a forecasting model; alert click-through rose from 3% to 8%.
Boston University · Graduate Researcher, Department of Statistics
2016 – 2021
- Developed treatment-effect methods for missing data; taught graduate regression three semesters.
Education
Boston University · Ph.D. in Statistics
2021
Dissertation: Doubly robust estimation of heterogeneous treatment effects under missingness
Eötvös Loránd University · B.Sc. in Mathematics
2016
Selected Publications
Varga, E. and Lin, J. "Doubly Robust Uplift Modeling with Incomplete Outcomes." J. Causal Inference (2022)
Varga, E. "Calibrated Fraud Scores for Human-in-the-Loop Review." KDD Applied Data Science Track (2024)
Skills
Modeling: causal inference, experimentation, gradient boosting, learning to rank, time series, PyTorch
Engineering: Python, SQL, Spark, Airflow, MLflow, Docker, AWS SageMaker