Senior Data Scientist — AdTech & Healthcare AI Innovator

Sii Poland; Lublin; On-site; PLN 210,000 - 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 a senior ML-focused engineer to design probabilistic methods for large healthcare datasets and to own model evaluation, performance, and scalability in production.

You will work with Python, PyTorch, and SQL-based data warehouses (Snowflake, BigQuery, Databricks), contributing to end-to-end ML pipelines from data extraction to deployment in a collaborative, fast-growing team.

Qualifications

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

Responsibilities

• Measuring existing model performance and identifying improvements.
• Own design of new methodology and training of next-gen model for predictive power and scalability.
• Extracting entities and attributes from heterogeneous sources (structured and unstructured).
• Designing and implementing probabilistic entity linking and matching across large healthcare datasets.
• Exploring graph technologies and graph theory.
• Building and owning analytics data store, evaluation, and monitoring pipelines.

Skills

Production ML

Data engineering

English proficiency

Tools

scikit-learn

PyTorch

LightGBM

Splink

spaCy

Hugging Face

Job description

Sii Poland is seeking a senior ML-focused engineer to design probabilistic methods for large healthcare datasets and to own model evaluation, performance, and scalability in production.

You will work with Python, PyTorch, and SQL-based data warehouses (Snowflake, BigQuery, Databricks), contributing to end-to-end ML pipelines from data extraction to deployment in a collaborative, fast-growing team.