Наталя

Natalia Kostiukevych
JUNIOR DATA ANALYST
SUMMARY
Motivated and detail-oriented junior data analyst with foundational knowledge gained after
completing specialized courses. Skilled in data cleaning, analysis, and basic visualization
techniques. Eager to apply analytical skills to solve real-world business problems and
grow in a data-driven environment. I am keen to learn from seasoned professionals to
build my expertise and improve my practical skills.

PROJECT EXPERIENCE
MRR & User Values Analytics Dashboard
Tools: SQL, Tableau
Description: Designed an analytical dashboard to track revenue dynamics and identify key
factors influencing financial inflows.
CONTACTS My tasks: I first queried the data using SQL to calculate key metrics, and then created
visualizations in Tableau, where I also computed some additional metrics directly within
[відкрити контакти](див. вище в блоці «контактна інформація»)
the tool.
[відкрити контакти](див. вище в блоці «контактна інформація») Result: Created a dashboard to track project revenue. It enables product managers to track
Telegram revenue dynamics and perform high-level analysis of the factors driving these changes.
LinkedIn The charts allow filtering by time periods and user segments, enabling detailed analysis of
Kyiv, Ukraine user behavior and revenue trends.
Personal Project: Spotify Listening Behavior Analysis
Tools: SQL, Tableau
HARD SKILLS Description: Analyzed Spotify user listening behavior (July 2020 – June 2025), focusing on
SQL engagement and listening duration.
Python My tasks: Cleaned and preprocessed data, including parsing JSON and CSV files,
Product analysis calculated key metrics (Play Time, Avg per Play, Skip Rate, Intent Rate), and created
Cohort analysis dashboards in Tableau.
Advertasing companies analysis Result: Interactive dashboards showing listening trends, engagement metrics, and
A/B tests seasonal patterns, with KPIs for total and average values.

Basic knowledge of statistics and E-commerce Conversion Analytics
probability Tools: SQL, Tableau, Python, BigQuery
Description: Interactive dashboard for the marketing department, providing core
performance indicators with drill-down functionality to analyze data across specific user
TOOLS segments and traffic sources.
Tableau My Tasks: Independent project within a data analytics program — extracted and prepared
Microsoft Power BI data, and designed an interactive marketing dashboard.
Google Sheets Result: Provided a clear overview of main KPIs and the sales funnel, helping the team
Looker Studio identify trends and optimize processes.
BigQuery
Jupyter Notebook
Pandas
WORK EXPERIENCE
WATER TREATMENT SPECIALIST
Chysta Voda Group | june 2014 – february 2022
LANGUAGES
Performed technical calculations to select optimal equipment based on water analysis
English - Intermediate and system parameters. Conducted in-depth analysis of raw water quality data, client
Ukrainian - native requirements for treated water, and technical constraints to design effective treatment
solutions.
Prepared customized commercial proposals, including technical specifications, system
EDUCATION
configurations, and cost estimates, ensuring alignment with both technical feasibility
IT SCHOOL “GOIT” and client expectations.
Data Analysis
SALES MANAGER
2025
Troika LTD | march 2011 – june 2014
V.I.VERNADSKY TAURIDA Advised residential and industrial clients on water purification systems and supported
NATIONAL UNIVERSITY them through the full sales cycle from initial consultation to final purchase.
Specialist degree in Ecology
2001-2006