Aleksandra Maj-Kańska
Warszawa
Summary
Results-driven Data Scientist with 8+ years of experience delivering machine learning and AI solutions for product and business optimization. Proven ability to design and scale end-to-end data science architectures from concept to production in cloud environments (Azure, Databricks). Skilled in Python, SQL, Spark, and statistical modeling with a strong foundation in mathematics and applied statistics.
Practical experience in transformer-based NLP, forecasting, and recommendation systems, including fine-tuning LLM models (BERT, DistilBERT). Adept at writing production-grade code and implementing ML pipelines using PySpark and MLflow. Passionate about leveraging data-driven methodologies to solve complex business problems.
Overview
15
15
years of professional experience
Work History
Data Scientist /Data Engineer
Atos R&D Poland
03.2017 - Current
- Designed and implemented semantic matching and LLM solutions for entity mapping and knowledge extraction.
- Trained and fine-tuned Transformer models (BERT, DistilBERT) for text-based classification and semantic similarity.
- Built and automated ML pipelines using PySpark, and MLflow on Databricks, enabling scalable and reproducible experimentation.
- Deployed models to Azure-based environments and collaborated closely with software engineers.
- Building recommendation engines and user-scoring models, driving increased engagement and improved conversion rates.
- Conducted experiment design, debugging, and model evaluation, ensuring robust, explainable results.
- Worked cross-functionally with product owners and business stakeholders to translate analytical findings into actionable recommendations.
- Implemented data ingestion pipelines using Azure Data Factory and maintained integration with business systems.
Specialist for Risk Modeling
Alior Bank S.A.
04.2014 - 06.2015
- Developed predictive and ranking models for internal risk assessment systems.
- Applied statistical and econometric methods (regression, scoring models) for property price and bankruptcy risk prediction.
- Delivered data-driven decision support for business and risk management teams.
Teaching Assistant
University of Warsaw, Warsaw University of Technology
10.2010 - 02.2014
- Warsaw University of Technology, Faculty of Mathematics and Information Science — October 2013 – February 2014: “Selected Advanced Topics in Machine Learning”
- University of Warsaw, Faculty of Mathematics, Informatics and Mechanics — 2010 – 2012: Statistics and Introduction to Mathematics
Education
No Degree - PhD Coursework in Data Mining
Polish Academy of Sciences
Warsaw, PolandMaster of Science - Applied Mathematics (Statistics)
University of Warsaw
Warsaw, Poland06-2011
Bachelor of Science - Economics (Econometrics)
University of Warsaw
Warsaw, Poland06-2010
Skills
Programming: Python, R, SQL, Scala
Machine Learning / Statistical Modeling / Analytics: classification, clusterization, regression, ranking, NLP, deep-learning (BERT, DistilBERT), recommendation systems, predictive modeling, hypothesis testing
Tools & Platforms: PySpark, Databricks, Azure Data Factory, MLflow, R Shiny, git, Google Data Studio, Jira
Cloud: Microsoft Azure
Visualization: Python (matplotlib, seaborn, Plotly), R Shiny, Google Data Studio
Additional Information
Publications & Projects
- Co-author of "Delete or merge regressors for linear model selection," Electronic Journal of Statistics (2015).
- Co-author of "Simultaneous Deleting or Merging Regressors for Linear Model Selection," Institute of Computer Science PAS (2013).
Developed R packages: DMR (2013), lmmfit (2011).
Languages
Polish
Native or Bilingual
English
Full Professional
German
Limited Working
Timeline
Data Scientist /Data Engineer
Atos R&D Poland
03.2017 - Current
Specialist for Risk Modeling
Alior Bank S.A.
04.2014 - 06.2015
Teaching Assistant
University of Warsaw, Warsaw University of Technology
10.2010 - 02.2014
No Degree - PhD Coursework in Data Mining
Polish Academy of Sciences
Master of Science - Applied Mathematics (Statistics)
University of Warsaw
Bachelor of Science - Economics (Econometrics)
University of Warsaw