Senior Data Scientist - Predictive ML for Marketing Growth

Sii Poland; Lublin; On-site; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Great Place to Work

Solid financial situation

Contracts with the biggest brands

Centre of internal trainings

Many experts you can learn from

Open and accessible management team

Profit sharing

Passion Sponsorship program

Regular integration events and trips

Comfortable and well-equipped offices

MySii app

Medical care

Job summary

Sii Poland is seeking an experienced Data Scientist to help build predictive models and translate analytics into actionable business decisions in a large multinational setting. You will focus on churn, propensity, segmentation and CLV modeling, analyzing consumer and marketing data, and shaping data-driven marketing performance.

The role emphasizes collaboration with marketing and product teams, interpreting results for leadership and delivering clear guidance to business units.

Qualifications

• Minimum 5 years of experience as a Data Scientist.
• Strong proficiency in SQL – write complex queries and prepare data for modeling.
• Proficiency in Python with data analysis and modeling libraries.
• Experience with large datasets and ETL processes.
• Ability to interpret analytical results for business decisions.
• Attention to code quality and reproducibility of analyses.
• Ability to communicate effectively in English in an international environment.

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.

Skills

SQL

Python

Data analysis

ETL processes

Business data interpretation

Code quality

English communication

Tools

pandas

NumPy

scikit-learn

statsmodels

Job description

Sii Poland is seeking an experienced Data Scientist to help build predictive models and translate analytics into actionable business decisions in a large multinational setting. You will focus on churn, propensity, segmentation and CLV modeling, analyzing consumer and marketing data, and shaping data-driven marketing performance.

The role emphasizes collaboration with marketing and product teams, interpreting results for leadership and delivering clear guidance to business units.