Senior Data Scientist: Marketing Analytics & Growth

Sii Poland; Warszawa; On-site; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Great Place to Work

Profit sharing

Medical care

Centre of internal trainings

Opportunities to learn from experts

Job summary

Sii Poland is seeking an experienced Data Scientist to join a newly formed analytics team in Warsaw. You will build predictive models, analyze consumer and marketing data, and translate analytics into actionable business decisions.

You will collaborate with marketing and product teams to set analytical priorities, deliver insights with clear visuals, and track model performance on KPIs to drive data-driven decisions across the organization.

Qualifications

• Minimum 5 years of experience as a Data Scientist.
• Strong SQL skills to write complex queries and prepare data for modeling.
• Proficient in Python for data analysis, modeling and validation.
• Experience with large datasets and ETL processes.
• Ability to interpret analytics results for business use and communicate in English.

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 analytical findings into clear business recommendations.
• Deliver outputs with actionable usage guidance for business teams.
• Prepare presentations, reports and data visualizations for non-technical stakeholders.
• Track model performance and measure business impact on marketing KPIs and P&L.
• Identify opportunities for data-driven growth and advocate data-based decisions.

Skills

SQL proficiency

Python for modeling

ETL processes

Data interpretation

English communication

Job description

Sii Poland is seeking an experienced Data Scientist to join a newly formed analytics team in Warsaw. You will build predictive models, analyze consumer and marketing data, and translate analytics into actionable business decisions.

You will collaborate with marketing and product teams to set analytical priorities, deliver insights with clear visuals, and track model performance on KPIs to drive data-driven decisions across the organization.