Hannah Okonkwo
Data Scientist, Recommendations and Experimentation
Boston, MAhannah.okonkwo@example.com(617) 555-0152Summary
Data scientist with six years of experience building and shipping machine learning models in e-commerce and insurance. Built the product recommendation model that now drives the home page for three million monthly shoppers, validated in a controlled experiment before launch. Strong in Python, SQL and experiment design, and in explaining model trade-offs to product managers.
Experience
Data Scientist, Harborline Market
– Present
Boston, MA
- Built a two-stage recommendation model (candidate retrieval and gradient-boosted ranking) that raised add-to-cart rate on the home page in a four-week experiment.
- Deployed the model as a batch job on Airflow with daily retraining and drift alerts, working with two ML engineers.
- Designed the company's experimentation guidelines, including power analysis and a sequential testing option, used by six product teams.
- Forecast weekly demand for 12,000 products to guide purchasing, replacing a spreadsheet method with lower error.
Associate Data Scientist, Granite State Insurance Group
–
Manchester, NH
- Built a claim severity model used by adjusters to prioritize the claims most likely to escalate.
- Rebuilt the renewal pricing model with underwriters, with documentation that passed the company's model risk review.
- Created a feature store for customer attributes that three analysts reused in later projects.
Education
M.S. in Applied Statistics
Bay Colony University, Worcester, MA
B.S. in Mathematics
Bay Colony University, Worcester, MA
Skills
- Python (scikit-learn, pandas, PyTorch)
- SQL
- Gradient boosting
- Recommender systems
- Time series forecasting
- Experiment design
- Causal inference
- Airflow
- Spark
- MLflow
- AWS SageMaker
- Model monitoring