Senior Data Scientist - Predictive Modeling for Marketing Growth

Sii Poland; Łódź; On-site; PLN 180,000 - 280,000; Full time

Benefits offered by this job

Great Place to Work

Solid financial situation

Contracts with the biggest brands

Centre of internal trainings

Profit sharing

Regular integration events and trips

Medical care

Job summary

Sii Poland is seeking an experienced Data Scientist to join a newly formed analytics team. The role centers on predictive modeling, consumer insights, and turning analytics into actionable business decisions for marketing and consumer strategy.

You will work in an international environment, collaborating with marketing and product teams to define analytical priorities and drive measurable business impact.

Qualifications

• 5+ years of experience as a Data Scientist.
• Strong proficiency in SQL and Python for data analysis and modeling.
• Experience with large datasets and ETL processes.
• Ability to interpret results and communicate to business teams.
• Attention to code quality and reproducibility of analyses.
• Fluent English in an international environment.

Responsibilities

• Build and optimize predictive models (e.g., churn, segmentation, CLV).
• Analyze consumer and marketing data from multiple sources.
• Model and optimize customer journeys using AI/ML techniques.
• Collaborate with marketing and product teams to set analytical priorities.
• Translate analytic findings into actionable business recommendations.
• Deliver outputs with usage guidance for business teams.
• Prepare presentations, reports, and data visualizations for non-technical stakeholders.
• Track model performance and measure impact on marketing KPIs.

Skills

SQL

Python (pandas/numpy/scikit-learn)

ETL

Communication in English

Data analysis

Job description

Sii Poland is seeking an experienced Data Scientist to join a newly formed analytics team. The role centers on predictive modeling, consumer insights, and turning analytics into actionable business decisions for marketing and consumer strategy.

You will work in an international environment, collaborating with marketing and product teams to define analytical priorities and drive measurable business impact.