About the Position

We are seeking a Senior Data Scientist with ML expertise to join our analytics team in the tobacco industry, focusing on predictive modeling and consumer insights.

Responsibilities

Build and optimize predictive models (e.g., churn, propensity, segmentation, CLV, recommendations)
Analyze consumer and marketing data across multiple sources
Model and optimize customer journeys using AI/ML techniques
Collaborate with marketing and product teams to define analytical priorities
Translate complex analytical findings into clear business recommendations
Deliver analytical outputs together with actionable usage guidance for business teams
Prepare high-quality presentations, reports, and data visualizations for non-technical stakeholders
Track model performance and measure business impact on marketing KPIs and P&L
Identify new opportunities for data-driven growth and champion data-based decision-making across the organization

Requirements

Minimum 5 years of experience as a Data Scientist
Strong proficiency in SQL – ability to write complex queries, join large datasets, and prepare data for modeling
Proficiency in Python (libraries such as pandas, numpy, scikit-learn, statsmodels, or similar) – focus on data analysis, modeling, and result validation
Experience working with large datasets and ETL processes
Ability to work with business data and interpret analytical results
Attention to code quality and reproducibility of analyses
Ability to communicate effectively in English in an international environment

Nice to Have

Expertise in the marketing and consumer analytics domain
Good understanding of segmentation models (clustering, scoring, customer profiling) and predictive models (propensity, churn, LTV)
Basic knowledge of model validation and performance metrics (AUC, lift, confusion matrix)

Technologies

Must have

SQL
Python
ETL
Machine Learning
Predictive Models

Will be a plus

Pandas
NumPy
Scikit-learn
Statsmodels

We Offer

Competitive salary
Opportunity to work in a leading global company in the tobacco industry
Collaborative and innovative work environment
Professional development opportunities

About the Company

Sii ensures that all employment-related decisions are made solely on the basis of qualifications, competencies, and performance. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promote a diverse and inclusive work environment.

Location

City: Bialystok, Bydgoszcz, Cracow
Country: Poland

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Data Scientist with ML (f/m/x)

Job description