Tatiana Vinnytska

• • Conduct data analysis using SQL, BigQuery, PostgreSQL and Python (Pandas, NumPy)

• • Build interactive dashboards in Tableau, Looker Studio and Power BI for product, marketing and operations teams

• • Perform cohort, retention and unit economics analysis for SaaS and e‑commerce datasets

• • Design and optimize SQL queries for large datasets (100k–10M+ rows)

• • Automate reporting workflows and data cleaning processes

• • Conduct A/B testing and statistical analysis to support decision‑making

• • Communicate insights clearly to non‑technical stakeholders

Data Analysis & Profitability: Analyzed sales data and market trends to identify gaps in the service portfolio, leading to the successful launch of new high margin services and a measurable increase in salon profitability. Process Optimization: Conducted a comprehensive audit of the pricing structure and online booking data. Redesigned the price list and booking flow based on customer behavior patterns, significantly reducing drop-off rates and enhancing user experience. Operational Management: Leveraged operational metrics to streamline service delivery and resource allocation. Managed full-cycle recruitment, using structured assessments to hire and train 5+ employees, ensuring high retention and team performance. Performance Tracking: Established key performance indicators (KPIs) for staff and service categories to monitor business health and support daily decision making.

Managed client relations, providing consultations and ensuring high-quality service delivery. Testing candidates, and

supervising internships.