Senior Data Scientist

Since 1999, the company has expanded from listings into payments, shipping and seller financing. Hollowpath operates consumer websites and apps used by tens of millions of people each month. Founded in 1999, we now have 1,700 employees.

The position:

Hollowpath needs someone comfortable with both statistics and production code. This hire will own our demand forecasting models and the process for keeping them accurate as conditions change. The company is based in Warsaw, Poland. Our team works from several countries. This is a full-time remote role. We use an employer of record in Senegal, so you get a proper employment contract, not a freelance agreement. Core hours are 10:00 to 15:00 CET. We talk mostly in Slack and hop on quick calls when something needs discussing.

Your responsibilities:

• Present findings to product, marketing and finance leaders with clear recommendations
• Package reusable code instead of leaving it in one-off notebooks
• Develop time series forecasts with Prophet, statsmodels or gradient-boosted approaches
• Segment customers and build churn and lifetime value models
• Estimate causal effects with difference-in-differences, propensity matching or regression discontinuity
• Build predictive models in Python using scikit-learn, XGBoost or LightGBM

Qualifications:

• 5+ years of applied data science experience
• MS or PhD in statistics, economics, computer science, physics or another quantitative field, or a BS plus equivalent experience
• Experience building and validating machine learning models on real business data
• Solid grasp of statistical inference, regression and experimental design
• Strong Python (pandas, NumPy, scikit-learn) and SQL

Nice to have:

• MLflow or another experiment tracking tool
• Pricing or marketing mix modelling
• Spark for large datasets
• Published research or strong Kaggle results

Compensation: XOF 1,500,000 - XOF 1,800,000 monthly

What you get:

• Annual salary review
• Health insurance through our employer-of-record partner
• Home office setup budget
• Paid sick days
• 24 days paid time off

Start: Immediately.

Demo job created on 11jobs for testing and demonstrations. It is not an actual opening at Hollowpath.