Lead Data Scientist

Who we are:

Clients range from single-location retailers to franchise groups with hundreds of stores, all running our point-of-sale and loyalty software. Most of what we build is back-office software for property managers, including lease tracking, work orders and tenant payments. Founded in 2001, we now have 130 employees. On-call rotates weekly and pays a flat stipend whether or not the pager goes off.

About the role:

We're looking for a Lead Data Scientist to join our team in Łódź. The Marketing Science team works directly with product and finance. You'll design experiments, build forecasts and explain the results. This role is remote. You will need a reliable internet connection and a quiet place to work.

What you'll work on:

• Build predictive models in Python using scikit-learn, XGBoost or LightGBM
• Review peers' analyses for statistical correctness
• Present findings to product, marketing and finance leaders with clear recommendations
• Translate vague business questions into problems the data can actually answer
• Develop time series forecasts with Prophet, statsmodels or gradient-boosted approaches
• Validate model performance and document assumptions and limitations
• Pull and shape data with SQL from Snowflake, BigQuery or Databricks

About you:

• 7+ years of applied data science experience
• Solid grasp of statistical inference, regression and experimental design
• MS or PhD in statistics, economics, computer science, physics or another quantitative field, or a BS plus equivalent experience
• Strong Python (pandas, NumPy, scikit-learn) and SQL
• Ability to communicate uncertainty and tradeoffs to non-technical audiences
• Comfort with Jupyter, VS Code or Databricks notebooks

Preferred qualifications:

• Bayesian methods with PyMC or Stan

Perks and benefits:

Salary range: PLN 26,000 - PLN 30,000 monthly

• Private medical care
• Language courses
• Flexible hours
• Annual bonus
• Multisport card
• Training budget
• Meal vouchers

Candidates must be eligible to work in Poland.

Start: Immediately.

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