Дарина

DARYNA SHERENHOVA
DATA ANALYST
[открыть контакты](см. выше в блоке «контактная информация») [открыть контакты](см. выше в блоке «контактная информация») Kyiv, Ukraine, remote/on-site

Telegram [Daryna] LinkedIn [Daryna Sherehnova] [GitHub] [Tableau]

SUMMARY
Detail-oriented Data Analyst with hands-on experience in SQL (BigQuery), Python, Tableau, and Looker
Studio. Built complex analytical pipelines to uncover user behavior patterns, optimize product
performance, and segment customers across geographies. Created a dynamic A/B testing tool that
automated significance testing for conversion metrics using statistical methods and Python scripting.
Delivered multiple dashboards with actionable insights, applying statistical correlation analysis and
hypothesis testing. Strong understanding of SDLC, Agile (Scrum), and data-driven decision making.
Committed to continuous learning, with a background in military leadership and government-level
discipline.

SKILLS
Spreadsheets: Pivot Tables, Data Cleaning, Data Wrangling, Visualization
SQL: Advanced Queries, Window Functions, Common Table Expressions (CTEs), Query Optimization
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, Excel, Google Analytics, Version Control with Git
Project & Task Management: Notion, Team Collaboration, Time Management
Development Process: Knowledge of SDLC, Waterfall, Agile (Scrum, Kanban)
Languages: English (Intermediate)

EXPERIENCE
Projects:
Project: User Activity & Email Engagement Analysis (SQL + Looker Studio) – Analyzed user
engagement metrics in an e-commerce dataset using BigQuery. Built a complex SQL query with
CTEs and window functions to generate insights on account creation, email activity, and
unsubscribes segmented by country, date, and verification status. Visualized top-performing
markets and email dynamics in the Looker Studio dashboard.

Technologies: SQL (BigQuery), CTE, Window Functions, Data Aggregation, Looker Studio
Link to review [GitHub]

Project: User Activity & Email Engagement Analysis (SQL + Looker Studio) – E-commerce Sales
Analytics Dashboard (SQL + Python + Tableau) – Created a full analytical pipeline for an online
store. Queried and joined multi-table data in BigQuery, performed Exploratory and Statistical Data
Analysis in Python, and visualized KPIs and customer behavior via an interactive Tableau
dashboard. Analyzed revenue trends, product performance, and regional customer activity with
statistical testing and correlation insights.

Technologies: SQL (BigQuery), Python (Pandas, NumPy, Matplotlib, SciPy), Tableau
Link to review [GitHub]
 Project: A/B Testing Statistical Analysis Tool (Python + Tableau) – Automated significance
testing for A/B experiments using Python with flexible loops and array-based calculations across
four key conversion metrics. Created a Tableau dashboard with dynamic filters to visualize test
results, highlight statistically significant changes, and segment by country/device. Added
explanatory logic for reproducibility.

Technologies: Python (SciPy, statsmodels), Google Colab, Tableau
Link to review [Tableau]

Chief Specialist for Complaint Review in the Field of Public Procurement at Antimonopoly
Committee of Ukraine, July 2023 – April 2025
Handled large datasets and document flows, performed comprehensive information analysis to
prepare high-impact decisions, and implemented workflow automation using Excel.

Technologies: Excel, Google Sheets, Google Docs

EDUCATION

Institution: State Tax University, Irpin, Ukraine
Qualification and Degree: Master’s Degree in Law
Dates Attended [ e.g., 2023 - 2025]

ADDITIONAL EDUCATION

Data Analyst course at Mate Academy
Book: “Storytelling with Data” by Cole Nussbaumer Knaflic
Applied techniques from the book to improve the clarity and impact of dashboards and data
presentations

ACHIEVEMENTS

Completed military high school with enhanced physical and tactical training
Graduated from the Military Department and received the rank of Junior Lieutenant in the Reserve of
the Armed Forces of Ukraine
Worked as a civil servant at a central executive authority with special status (national-level
government office)