Vasyl

VASYL KYRYCHUK
DATA ANALYST
Lviv, Ukraine (Remote / Office / Hybrid) | [відкрити контакти](див. вище в блоці «контактна інформація») | Email | Telegram | LinkedIn | GitHub | Tableau

Data Analyst with a Master's-equivalent degree in Mechanics and Applied Mathematics and hands-on experience in SQL, Python, BigQuery,
Tableau, and statistical analysis. Built end-to-end analytics projects covering data extraction, cleaning, EDA, funnel analysis, cohort analysis,
retention, churn, and A/B testing. Strong technical background in systems administration and troubleshooting, bringing a structured and
analytical approach to data analysis and problem-solving.

SKILLS
SQL Advanced Queries, Window Functions, Joins, Aggregations, CTEs, BigQuery
Python Pandas, NumPy, Matplotlib, SciPy, Exploratory Data Analysis (EDA)
Data Analysis Funnel Analysis, Cohort Analysis, Retention, Churn, KPI Analysis
Statistics & A/B Hypothesis Testing, Two-Sample Z-test, Sample Ratio Mismatch (SRM), Statistical Significance
BI & Visualization Tableau (incl. Tableau Public), Power BI, Power Query, Excel & Google Sheets
IT Infrastructure System Administration, Network Setup (LAN/Switches), Server Diagnostics, Access Management
Tools Google Colab, Jupyter Notebook, Git, GitHub
Languages English (B1+), Ukrainian (Native)

EXPERIENCE
Data Analytics Projects 2026 – Present
• Extracted, cleaned, and transformed data from relational databases using SQL, including JOINs, CTEs, Window Functions, and
aggregations.
• Analyzed user behavior and funnel performance using Python (Pandas, NumPy), including cohort, churn, and retention analysis to locate
where users drop off.
• Evaluated A/B test results using Python (SciPy), including SRM validation, two-sample Z-tests, and statistical significance testing.
• Built interactive Tableau dashboards to track business KPIs including AOV, Retention, and LTV.

IT Infrastructure & Systems Specialist — Self-employed 2013 – 2025
• Managed system administration, access control, and network configuration (LAN/switches) for a wide range of clients, including small
businesses, retail stores, and government institutions.
• Diagnosed and resolved hardware, OS, and network infrastructure issues using structured root-cause troubleshooting.
• Installed and configured CCTV systems and related monitoring software.

PROJECTS
E-commerce Data Analysis
SQL (BigQuery) · Python (Pandas) · Tableau
• Analyzed platform performance end-to-end, including data cleaning, transformation, and KPI analysis.
• Segmented transactional data by traffic channel, device, and user segment to compare Revenue, Conversion Rate, and AOV and locate
funnel drop-offs.
• Built an interactive Tableau dashboard with drill-down filters to explore funnel drop-offs and behavioral trends.
GitHub: Ecommerce-Data-Analysis
A/B Testing & Statistical Analysis
Python (SciPy) · Statistics · Tableau
• Evaluated an A/B experiment for a product/UX change to test whether it had a measurable effect.
• Validated experiment data with Sample Ratio Mismatch (SRM) checks before hypothesis testing.
• Ran two-sample Z-tests, interpreted statistical significance, and visualized results in Tableau.
GitHub: A-B-Test-Analysis

EDUCATION
Master's Degree — Mechanics & Applied Mathematics
Faculty of Mechanics and Mathematics, Ivan Franko National University of Lviv
Additional Education
Mate Academy — Data Analytics Course
Harvard University — CS50: Introduction to CS

ACHIEVEMENTS
• Built and published multiple end-to-end analytics projects independently, from data sourcing and transformation to analysis and dashboard
delivery.
• Completed a 13 km open-water marathon swim and the Krayna Uzhhorod 10 km charity run.