Наталія

Nataliia Kovalska
Junior Data Analyst
Phone: [open contact info](look above in the "contact info" section) Location: Ukraine
Email: [open contact info](look above in the "contact info" section) Linkedin: [open contact info](look above in the "contact info" section)

SUMMARY
Detail-oriented Junior Data Analyst with experience working with data, reporting, and financial analysis.
Skilled in SQL, Python, Excel, and data visualization tools (Tableau). Experienced in cohort analysis, A/B
testing, and transforming data into actionable insights. Experienced in transforming raw data into actionable
business insights.
SKILLS
HARD S KILLS
SQL |BigQuery | Data Visualization | Tableau | Excel | Google Sheets |Python | Pandas | NumPy | Matplotlib |
Seaborn | Jupyter Notebook | A/B Testing | business metrics (conversion, ARPU, LTV, retention, churn) | data
cleaning and validation | data storytelling.
SOFT S KILLS
Analytical thinking | Attention to detail |Time management | Accuracy | Deadline compliance.

PROJECT EXPERIENCE
User Retention Analysis (Cohort Analysis)
Tools: SQL, Google Sheets
Performed cohort analysis and calculated retention rate
Identified user behavior patterns and churn points
Provided recommendations to improve user retention
Stack Overflow Developer Survey Analysis
Tools: Python (pandas)
Cleaned and analyzed survey data using Python
Conducted exploratory data analysis (EDA)
Analyzed key variables (programming languages, experience, salary)
Revenue Metrics
Tools: PostgreSQL,Tableau
Extracted and transformed data in PostgreSQL from payment and user datasets
Developed SQL logic using CTEs and window functions to calculate key business metrics.
Created an interactive dashboard for business monitoring and decision support.
WORK EXPERIENCE
Berehomet Forestry and Hunting Enterprise 02/2015 - 12/2024
Accountant
Performed data validation, managed payroll, sick leave, vacation pay, and compensation calculations,
maintained inventory and material accounting records, worked extensively with Excel, BAS, and 1C, ensured
data accuracy and reporting consistency, delivered reports within strict deadlines.

EDUCATION LANGUAGES
Data Analyst
GoIT - start your career in IT English —Intermediate
11/2025 - 06/2026
Specialist degree, Accounting and Auditing Ukrainian — Native
National Academy of the State Tax Service of Ukraine
1998-2004