Senior Data Scientist — Predictive ML for Marketing (Remote)

Sii Sp. z o.o.; Poznań; On-site; PLN 180,000 - 300,000; Full time

Benefits offered by this job

Private healthcare

Remote work

Car discounts

Training platform

Job summary

Sii Sp. z o.o. in Poznań is seeking an experienced Data Scientist with ML to join its analytics team and shape how data drives consumer strategy and marketing performance.

You will build predictive models, analyze cross-source data, and translate analytics into actionable business recommendations. Strong SQL and Python skills, plus ETL and handling large datasets, are essential for success. The role offers a dynamic work environment with a comprehensive benefits package and opportunities for

Qualifications

• Minimum 5 years of experience as a Data Scientist.
• Strong proficiency in SQL for complex queries and data preparation.
• Proficient in Python with libraries such as pandas, numpy, scikit-learn, and statsmodels.
• Experience with large datasets and ETL processes.
• Ability to communicate in English in an international environment.

Responsibilities

• Build and optimize predictive models (e.g., churn, propensity, segmentation, CLV).
• 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 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 KPIs and P&L.
• Identify new opportunities for data-driven growth and champion data-based decision-making.

Skills

SQL

Python

ETL

Machine Learning

Predictive Models

Education

Minimum 5 years of experience as a Data Scientist

Tools

Pandas

NumPy

Scikit-learn

Statsmodels

Job description

Sii Sp. z o.o. in Poznań is seeking an experienced Data Scientist with ML to join its analytics team and shape how data drives consumer strategy and marketing performance.

You will build predictive models, analyze cross-source data, and translate analytics into actionable business recommendations. Strong SQL and Python skills, plus ETL and handling large datasets, are essential for success. The role offers a dynamic work environment with a comprehensive benefits package and opportunities for