Senior Data Scientist

Company overview:

Our engineering, trust and safety, and customer support teams work across offices in Nashville and several other countries. Since 1988, the company has expanded from listings into payments, shipping and seller financing.

The role:

We are adding headcount to this team, so this is a new seat. Expect messy, real data and a fair amount of time on feature engineering and validation. We are headquartered in Nashville and have been hiring remotely since 2020. You will join as an independent contractor on a long-term agreement. Payment is monthly in USD. Core hours overlap with US Central time, 9:00 AM to 1:00 PM CT. We ship you a laptop and accessories before your first day.

Responsibilities:

• Work with ML engineers to move models into production and monitor drift.
• Translate vague business questions into problems the data can actually answer.
• Design and analyse A/B tests, including power calculations and guardrail metrics.
• Estimate causal effects with difference-in-differences, propensity matching or regression discontinuity.

Minimum qualifications:

• MS or PhD in statistics, economics, computer science, physics or another quantitative field, or a BS plus equivalent experience.
• Data visualization in matplotlib, seaborn, Plotly or a BI tool.
• Ability to communicate uncertainty and tradeoffs to non-technical audiences.
• Solid grasp of statistical inference, regression and experimental design.
• Comfort with Jupyter, VS Code or Databricks notebooks.

Bonus points:

• Spark for large datasets.
• Pricing or marketing mix modelling.
• Bayesian methods with PyMC or Stan.

What you get:

Salary: €8,700-€10,000/month

• Monthly internet allowance.
• Flexible hours.
• Long-term engagement.
• Annual rate review.

Only shortlisted candidates will be contacted.

Duration: 9 months. Start: Within 30 days.

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