Position: Data Scientist
Category: Data Science
English level: upper
Years of experience: 4


1. Middle data scientist (June 2020 - Apr 2023)
SSA Group 
Full cycle of modeling sales data by random forest and XGBoost using SQL and R, including:
- extracting data using SQL;
- data analysis (missing values, general trends, structure of market);
- building a model in R (random forest/ XGBoost);
- model analysis and feature selection (whether they are correlated, whether they are insignificant, etc.);
- evaluation of different models and selection of the best one;
- use and support the chosen model, and its periodic reassessment to understand whether it is necessary
to retrain the model or build a new one.
2. Junior data scientist (April 2019 – May 2020)
Salv 
Creating SQL queries, search for general patterns in data, detecting money laundering using R.
3. Teaching assistant in R course (September 2019 – January 2020)
University of Tartu 
Helping students with R during seminars, checking homework and exams.
4. Statistical Operations Delivery Analyst (February 2018 – July 2018)
Nielsen Ukraine 
Investigate data inquiries, preparing statistical analysis.
5. Analyst (November 2016- June 2017)
Cargo Media AG 
Analyzing users of the social network using SQL and R, survival analysis.
Віддаю перевагу R перед Python.