Senior Data Scientist: AI-Driven Healthcare Data GraphML

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

Benefits offered by this job

Great Place to Work

Profit sharing

Centre of internal trainings

Many experts you can learn from

Open and accessible management team

Medical care

Job summary

Sii Poland is seeking a Senior Data Scientist to join a project building an AI-powered operating system for healthcare marketing. You will design and implement entity extraction, linking, and resolution at scale, reconciling large datasets into reliable entities and attributes.

You will work with production-grade data products, applying graph ML, probabilistic matching, and ETL practices to ensure data quality and actionable insights for life sciences campaigns and audience reach.

Qualifications

• 5+ years shipping production ML or data-science work including entity linking at scale.
• Proficient Python with production-grade, tested, typed code.
• Strong SQL and experience with FastAPI, Docker, pytest, Git and CI/CD.
• Practical experience with probabilistic match scoring and evaluation.
• Knowledge of graph algorithms/ML, embeddings and GNNs.
• Experience with ETL over large datasets and data-quality monitoring.
• Familiarity with Snowflake, BigQuery, Databricks and graph tech like Neo4j/Amazon Neptune.
• Advanced level of English.

Responsibilities

• Extract entities and attributes from heterogeneous sources including warehouses and documents.
• Design probabilistic entity linking and deduplication across large healthcare datasets.
• Own the linking pipeline end-to-end with scoring and calibrated match probabilities.
• Define link quality metrics: precision, recall, calibration and error analysis.
• Link entities to controlled medical vocabularies for cross-source consistency.
• Apply graph representations and graph ML for linking, clustering, centrality, and link prediction.
• Build and maintain data and graph estate, including warehouse transformations.
• Improve performance of existing algorithms as data sources evolve.

Skills

Entity linking

Graph ML

Python

SQL

Production ML

English proficiency

Tools

FastAPI

Docker

pytest

Git

CI/CD

Snowflake

BigQuery

Databricks

Neo4j

Amazon Neptune

Job description

Sii Poland is seeking a Senior Data Scientist to join a project building an AI-powered operating system for healthcare marketing. You will design and implement entity extraction, linking, and resolution at scale, reconciling large datasets into reliable entities and attributes.

You will work with production-grade data products, applying graph ML, probabilistic matching, and ETL practices to ensure data quality and actionable insights for life sciences campaigns and audience reach.