Олександр

Olexandr Skrypnyk
DATA ANALYST
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Vinnytsia, Ukraine

Summary
Data Analyst with experience in collecting, cleaning, and analyzing large datasets. Proficient in SQL, Python (Pandas,
NumPy, Seaborn, Matplotlib), Visual Studio Code, Colab, Access, Excel, Google Sheets, Power BI, Tableau, and Looker
Studio for data processing and visualization. I develop and execute analytical reporting, perform trend analysis, and
development forecasting. I can explain complex processes using simple examples. I clearly explain research results, ways
to improve desired outcomes, and methods to eliminate or reduce negative impacts.

Hard skills
Data Analysis (data collection), A/B testing, ARPU, LTV, retention, churn, Data storytelling, Data cleaning and
preprocessing, statistical analysis, Data visualization.

Tools
Advanced proficiency in Python (Pandas, NumPy, Matplotlib, Seaborn), SQL, Jupyter Notebook, Visual Studio Code,
Google Colab, BigQuery, Google Sheets, Excel, Access, Looker Studio, Tableau, Power BI.

Soft skills
Data manipulation, problem-solving, critical thinking, empathy, multitasking, responsibility, desire to learn.

Project experience
Cohort Analysis, E-commerce.
https://docs.google.com/spreadsheets/d/13iuy2C5K4MpIJ5z7nsIctosUh90BewHPh4Vgav6CVdo/edit?usp=sharing
Tools: SQL, Google Sheets.
Description: Conducted cohort and segmentation analysis to evaluate key statistical indicators, purchase analysis,
regional purchase analysis, and churn analysis (uncompleted purchases).
Tasks: Cleaned and structured raw data, extracted and replaced incorrect data, formulated business queries and
extracted data via SQL, visualized metrics using charts and KPIs, developed dashboards and reporting.
Result: Provided recommendations for sales conditions optimization; supported a data-driven decision-making
strategy for online orders.

Professional experience
Valrom Ukraine LLC — Data Analyst / Quality Control Engineer / Head of Production Laboratory (2006 – Present).
Optimized production data entry and processing (MS Access), reducing data processing time by 20%.
Modernized analytical reporting for manufactured products, reducing time to obtain results by 50%.
Unified database operations with additional reports for quality and performance analysis, enabling instant access to
simple and detailed reports for any period.
Coordinated driver activities to optimize trips (GPS-control), reducing fuel costs by 5%.
Optimized the ISO 9001:2015 quality control system (MS Excel), improving the accessibility and readability of tasks and
results.
Achievements: Automated reporting on enterprise activities, reducing the time for daily, weekly, monthly, and annual
reports by 50%.

Languages
English – Elementary.
Ukrainian – Native.

Education
IT School "GoIT" (2023): Data Analysis.
Vinnytsia Trade and Economic Institute of Kyiv National University of Trade and Economics (1999 – 2005):
"Finance", Economist-Financier.
Vinnytsia State Technical University (1992 – 1997): "Mechanical Engineering Technology", Mechanical Engineer.