Senior Data Scientist — Graph ML & Entity Linking

Sii Poland; Toruń; On-site; PLN 260,000 - 380,000; Full time

Benefits offered by this job

Great Place to Work

Centre of internal trainings

Profit sharing

Regular integration events and trips

Medical care

MySii app

Comfortable and well-equipped offices

Job summary

Sii Poland is looking for 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 and fragmented datasets into reliable entities and attributes.

You will work on production-grade products for life sciences, ensuring data integrity and quality used for audience reach and insights.

Qualifications

• Minimum 5 years shipping production ML or data-science work.
• Experience with entity linking and resolution at scale.
• Strong Python production-grade code with typing.
• Hands-on with graph algorithms and ML techniques.

Responsibilities

• Extract entities and attributes from diverse sources including warehouses and documents.
• Design and implement probabilistic entity linking and deduplication across large healthcare datasets.
• Own the end-to-end linking pipeline, including scoring and calibrated match probabilities.
• Define link quality metrics such as precision, recall, calibration, and error analysis.
• Link entities to controlled medical vocabularies to ensure data consistency.
• Use graph representations and graph ML techniques for linking, including clustering and link prediction.
• Build and maintain the data and graph estate, including ETL and monitoring.
• Improve performance of existing algorithms as data sources evolve.

Skills

Python

SQL

FastAPI

Docker

pytest

Git

CI/CD

probabilistic methods

graph ML

ETL

data engineering

English

Tools

Snowflake

BigQuery

Databricks

Neo4j

Amazon Neptune

Job description

Sii Poland is looking for 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 and fragmented datasets into reliable entities and attributes.

You will work on production-grade products for life sciences, ensuring data integrity and quality used for audience reach and insights.