Олександр

HRESHCHUK [открыть контакты](см. выше в блоке «контактная информация»)
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OLEKSANDR Telegram: @Alex_Hreshchuk
LinkedIn: Oleksandr Hreshchuk
Odesa, Ukraine, remote, hybrid,
Data Analyst relocate

SUMMARY

Data analyst with intermediate English and financial education with 3 years of
entrepreneurial experience. Analytical mindset developed through participation in
math and computer science competitions. Proficient in SQL, Python, Excel,
Tableau, and Power BI through personal projects and ongoing learning. Highly
organized, inquisitive and committed to providing accurate data-driven solutions,
constantly improving technical skills.
SKILLS
Spreadsheets: Pivot Tables, Data Cleaning, Visualization
SQL: Advanced Queries, Window Functions, Query Optimization, Common Table
Expressions (CTE)
Python: Pandas, NumPy, Matplotlib, Seaborn, Exploratory Data Analysis (EDA)
Tableau: Interactive Dashboards, Data Storytelling, Publishing
Statistics: Sampling, Hypothesis Testing, Correlation, Statistical Significance
A/B Testing: Planning, Analysis, Reporting
Other Tools: Jupyter Notebooks, Google Analytics, Excel, Git
Languages: English Intermediate

PORTFOLIO

Project 1 (Google sheets Project)
Link to review
Built an interactive Tableau sales dashboard covering 1,330 orders, $1.7B
revenue across 46 countries. Performed ABC analysis by revenue and profit,
identifying margin-driven reclassifications (e.g., Snacks moving from tier B to A).
Analyzed sales channels, shipping times, and yearly/weekly trends; delivered
data-quality and market-concentration recommendations.

Project 2 (Python Project)
Link to review
Sales Data Analysis (Python) — statistical analysis of sales: geographic
concentration, category marginality, seasonality, anomalies; pandas, NumPy,
matplotlib/seaborn.
Project 3 (Portfolio Project)
Link to review
E-commerce Sales & Traffic Analysis (Python) — statistical analysis of traffic/sales
correlations, user segmentation (Mann-Whitney test), seasonality; pandas, SciPy,
matplotlib/seaborn.

PREVIOUS EXPERIENCE

Chief Accountant, LLC "Pryboi" (trade, services), Odesa, August 2008 – Now

Servicing one limited liability company and few individuals on a single tax (group 2 and 3)
Managing the company's financial flows, controlling income and expenses
Tracking and analyzing receivables and payables
Preparing and submitting tax returns

EDUCATION
Institution Odesa State Economic University, Odesa
Qualification and Degree Faculty of Accounting and Auditing Master`s Degree
(with honors)
Dates Attended September 1996 -July 2001

ADDITIONAL EDUCATION
Mate academy Data Analyst course {2026]
WebPromoExperts «Seo-optimization» [May 2017- June 2017]
QA TestLab QA Courses “Test Engineer [November 2015- December 2015]
Computer Academy «Step», Odesa Network technologies and system administration
[October 2002- November 2004]

ACHIEVEMENTS
Winner of Regional Tournament in Beach Tennis, Pickleball [2025-2026]
First rank in chess, third rank in table tennis