Data Scientist: AI-Driven, Enterprise Platform Innovator

Sii Poland; Rzeszów; On-site; PLN 180,000 - 230,000; Full time

Benefits offered by this job

Great Place to Work

Solid financial situation

Profit sharing

Centre of internal trainings

Regular integration events and trips

Medical care

MySii app

Job summary

Sii Poland is seeking a data scientist to turn ambiguous business questions into models and analyses that get used. You’ll frame problems, wrangle data, build and validate models, and explain what numbers mean to people who don’t speak Python.

You’ll work with pandas, NumPy, scikit-learn, and enterprise data platforms like Microsoft Fabric and Palantir Foundry, deploying analytics on major clouds. Fluency in English and Polish is required.

Qualifications

• At least 4 years in data science or applied analytics with production-ready models.
• Strong Python skills across the data stack (pandas, NumPy, scikit-learn).
• Solid statistical foundations for hypothesis testing and experimental design.
• Experience with cloud/data platforms (Azure, AWS, GCP, Snowflake, Databricks or Palantir).
• Ability to communicate results clearly to business stakeholders.

Responsibilities

• Translate business problems into analytical solutions with hypotheses and metrics.
• Explore, clean, and prepare data from structured and semi-structured sources.
• Build, validate, and tune ML models for classification, forecasting, and recommendation.
• Design and analyze experiments including A/B tests and causal analysis.
• Work with enterprise data platforms and deploy analytics in production environments.
• Create visualizations and narratives for technical and non-technical audiences.
• Collaborate with data engineers and ML/AI engineers to move models to production.
• Monitor models for drift and coordinate retraining and improvements.

Skills

Python

Data science

Communication

English fluency

Tools

Azure

AWS

GCP

Microsoft Fabric

Palantir Foundry

Power BI

Snowflake

Spark

Job description

Sii Poland is seeking a data scientist to turn ambiguous business questions into models and analyses that get used. You’ll frame problems, wrangle data, build and validate models, and explain what numbers mean to people who don’t speak Python.

You’ll work with pandas, NumPy, scikit-learn, and enterprise data platforms like Microsoft Fabric and Palantir Foundry, deploying analytics on major clouds. Fluency in English and Polish is required.