Tetiana Vinnytska's Work | ContraWork by Tetiana Vinnytska
Tetiana Vinnytska

Tetiana Vinnytska

Data Analytics Expert

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Warsaw, Poland

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Warsaw, Poland

Cover image for Analyzed revenue lifecycle using cohort
Analyzed revenue lifecycle using cohort tables and MMR tracking. Visualized user payment behavior, retention shifts, and total revenue dynamics for data-driven growth.
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Cover image for Comprehensive financial analysis across USA,
Comprehensive financial analysis across USA, EMEA, and APAC. Tracks ARPPU, Paid User dynamics, and revenue by software category to drive global growth strategy.
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Cover image for Logistics & Shipping Performance Dashboard
Logistics & Shipping Performance Dashboard
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Cover image for Global Media & Entertainment Data Analysis: 25k+ Movies Dataset
Global Media & Entertainment Data Analysis: 25k+ Movies Dataset
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Cover image for Developed a comprehensive SaaS analytics
Developed a comprehensive SaaS analytics system to track MRR dynamics and Unit Economics. Backend: Wrote complex SQL scripts (Window functions, CTEs) to transform raw payment data into monthly cohorts. Frontend: Built a Tableau dashboard for monitoring LTV, Churn Rate, and Revenue expansion/contraction. Result: Business can now identify exactly why revenue is changing and track customer lifetime value in real-time.
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Cover image for GA4 Ecommerce Analysis & Tableau
GA4 Ecommerce Analysis & Tableau Dashboard In this project, I transformed raw Google Analytics 4 data into an interactive Tableau dashboard. Key highlights: Processed 1.7GB of data in BigQuery using SQL (UNNEST, CTE). Visualized the full User Purchase Journey and conversion rates. Analyzed performance by device, OS, and landing pages to identify growth opportunities.
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