Senior Data Scientist: Large-Scale ML for AdTech-Healthcare

Sii Poland; Rzeszów; On-site; PLN 180,000 - 300,000; Full time

Benefits offered by this job

Great Place to Work

Centre of internal trainings

Profit sharing

Medical care

Open and accessible management team

Regular integration events and trips

Job summary

Sii Poland is seeking an experienced ML Engineer to design and implement probabilistic methods for entity linking and matching across massive healthcare datasets. You will own end-to-end model development, data pipelines, and evaluation, enabling scalable predictive power and robust monitoring in production.

The role requires deep Python expertise, strong SQL skills, and hands-on work with modern ML libraries.

Qualifications

• Minimum 5 years of experience in training and monitoring ML models for production use.
• Experience with data and ML engineering, including ML-facing ETL processes over very large datasets and data-quality monitoring.
• Expertise in Python data-science and ML libraries like scikit-learn, PyTorch, LightGBM, Splink, spaCy, and Hugging Face
• Practical experience in probabilistic methods for entity linking, matching, imputation, scoring, and evaluation
• Strong command of SQL for distributed warehouses such as Snowflake, BigQuery, or Databricks

Responsibilities

• Measuring existing model performance and finding ways to improve it
• Owning the design of the new methodology and training the next-gen model for increased predictive power, sample efficiency, and scalability to large datasets
• Extracting unique entities and sparse attributes from heterogeneous sources – both structured and unstructured
• Designing and implementing probabilistic entity linking & matching across multiple large healthcare datasets
• Exploring graph technologies and graph theory
• Building and owning an analytics data store, evaluation, and monitoring pipelines

Skills

Python

scikit-learn

PyTorch

LightGBM

SQL

English

probabilistic methods

graph theory

Tools

Snowflake

BigQuery

Databricks

Neo4j

Amazon Neptune

Job description

Sii Poland is seeking an experienced ML Engineer to design and implement probabilistic methods for entity linking and matching across massive healthcare datasets. You will own end-to-end model development, data pipelines, and evaluation, enabling scalable predictive power and robust monitoring in production.

The role requires deep Python expertise, strong SQL skills, and hands-on work with modern ML libraries.