Budimir Voroshilov

Job responsibilities: • Collaborated with cross-functional teams including Marketing, Product, and Customer Support. • Analyzed key marketing metrics (CAC, CR, ROI, etc.) and established pipelines for their systematic collection. • Assessed product performance, identified critical product metrics, and implemented data collection processes. • Developed machine learning models to analyze user behavior, forecast trends, and optimize product features • Evaluated the success of new features using A/B testing and alternative experimental methods. • Improved the internal A/B testing platform with enhanced features and monitoring capabilities. • Created and maintained dashboards with alerting systems in Redash, Superset, and Tableau. Key achievements: • Increased conversion rate by 3% through targeted A/B testing with creative banners (Delta Test, CUPED). • Boosted monthly revenue by 5% (over $1 million) in several product categories. • Enhanced user acquisition funnels, increasing monthly active users by 5%. • Implemented new features for the internal A/B testing platform to streamline experimentation. • Integrated the SPRT method to accelerate A/B test decision-making. • Redesigned and migrated the A/B test monitoring dashboard from Redash to Tableau for improved usability and visibility. • Built a gradient boosting model to identify high-value marketplace users in the electronics category based on demographics and behavioral patterns, supporting effective marketing segmentation. • Reduced dashboard load time by 20% (~100+ hours saved annually) by optimizing complex SQL queries.

Job responsibilities: • Financial planning • Controled the progress of renovations of the building • Inspection and acceptance of equipment according to lists • Recruitment • Emploees schedule planning Key achievements: • Created the public workshop concept • Created the project business plan • Created the lists of the purchase of equipment • Prepared and opened a project • Launched of a training and interaction system for visitors • Created a calendar of events for the year

Job responsibilities: • Mobile traffic analysis in Appsflyer. • Web traffic analysis in Google Analytics. • Analysis of marketing events. • Forecasting budgets for marketing events. • Participation in AB test design • Analysis of AB test results, matstat in Python (pandas, numpy, scipy, matplotlib, seaborn). • A/B tests сonclusions. • Queries in PostgreSQL. • Reporting on product metrics in Redash and PowerBI for the marketing department. Key achievements: • Conducted analyses on user data that highlighted trends, resulting in improved product features. • Created regular reports on key performance indicators (KPIs), improving visibility into product health. • Participated in project retrospectives and offered suggestions that improved future project workflows.