Senior Data Scientist: Healthcare AdTech & AI

Sii Poland; Łódź; On-site; PLN 180,000 - 280,000; Full time

Benefits offered by this job

Great Place to Work

Solid financial situation

Contracts with the biggest brands

Centre of internal trainings

Many experts you can learn from

Open and accessible management team

Profit sharing

Passion Sponsorship program

Regular integration events and trips

Comfortable and well-equipped offices

MySii app

Medical care

Job summary

Sii Poland is seeking an experienced ML Engineer to design and implement probabilistic methods for extracting signals from large healthcare datasets and to train next‑gen models for improved predictive power.

You will work with Python data science stacks, SQL for distributed warehouses, and graph technologies while ensuring production-grade ML pipelines and monitoring. English proficiency is required, and the role is based in Poland.

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.
• Advanced level of English.

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

SQL

English

Data science

Model deployment

Tools

Snowflake

BigQuery

Databricks

scikit-learn

PyTorch

LightGBM

Splink

spaCy

Hugging Face

Neo4j

Job description

Sii Poland is seeking an experienced ML Engineer to design and implement probabilistic methods for extracting signals from large healthcare datasets and to train next‑gen models for improved predictive power.

You will work with Python data science stacks, SQL for distributed warehouses, and graph technologies while ensuring production-grade ML pipelines and monitoring. English proficiency is required, and the role is based in Poland.