senior data analyst / data scientist

PyLadies Women Who Code Data And Analytics Journal
Olga Berezovsky


Analytics and Data Science leader with a passion for developing great products and tackling data challenges. I connect business with technology, develop partnerships, and mentor data analysts.

My vision

I want to change the way you think about data analysis. Data by itself doesn't bring any value. I use sophisticated data processing and transformation tools—combined with passion, creativity, and analytics—to tell a story with data that reveals its value and relevance. By performing data acquisition and developing user insights, I drive recommendations that can shape your product and maximize its value. To learn how I do this, subscribe to my newsletter:


Product Development and User Growth Analytics:

  • A/B and multivariate testing experiment setup & evaluation
  • User growth and engagement - scaling MAU, DAU
  • User retention and churn measurement and tracking
  • User acquisition strategy analysis
  • User segmentation and cohort analysis, developing personas

Data Science and Data Engineering:

  • Predictive modeling
  • Testing experiment design
  • Data modeling and building forecasts and prediction models
  • Developing and maintaining ETL, stored procedures
  • Schema design and dimensional data modeling
quantitative user profile analysis forecasting modeling user acquisition user retention user growth user segmentation product testing experiment setup & evaluation cohort analysis qualitative research text analysis long-term trends analysis lifetime value estimation subscription-based model analysis regression models

Recent analytics projects

  • Made recommendations for optimizing email programs which resulted in 3 times reduced unsubscribes and 2 times increased open rate
  • Scaled from 55% to 85% user retention by uncovering user behavior and conducting user cohort analysis
  • Documented RedShift Schema and Data Warehouse maintenance
  • Built forecast time series to predict user and revenue growth
  • Lead A/B testing products which included experiment setup and evaluation
  • Completed multivariable product experiment for CTA testing which lead to 2x increased revenue
  • Twice increased DAU/MAU ratio by developing user segments quantitative profile
  • Created and supported dashboards (Chartio, Tableau, Amplitude, Mixpanel, Looker, etc) and visualizations (RStudio, R ggplot2, Python Pandas)

Recent publications

Kaggle competition submission

connect with me

Linkedin Journal My Blog GitHub GitLab