Siarhei Zavaryn

Senior Data Analyst

Yandex | Яндекс•  September 2021 - Present

Stack: Python, PostgreSQL, YDB & YQL, DataLens (local visualization tool), Nirvana (cron task engine), Jira, Confluence I am responsible for projects at Sales and Commercial: I have provided business logic, solved raw data issues and created solutions for the model of restaurant’s churn, the ML solution for providing replacement of churned brands for customers based on user stories and preferences, the system of inflation rate monitoring, geoanalytics, etc. The key project is the predictive model of new restaurants launching: defining which restaurants that are not yet our delivery partners have the highest potential in generating orders and GMV for the Service and should be contacted with the highest priority. I created criteria, provided correlations and developed classification model.

Lead Data Analyst

ICNX•  February 2020 - September 2021

Stack: PostgreSQL, Amazon Redshift, Python, Adobe Campaign Management, Knime Analytics Platform, QlikView, Jira, Confluence ICNX provides business and infrastructure solutions to outsource. I worked at projects for Volkswagen, BMW, Audi, Procter & Gamble and Philip Morris Int. I developed B2C marketing communication: business solutions for Email trigger chains, databases development, metrics creation and A/B testing. Another part of projects was dedicated to machine learning solutions: I provided the result of churn models (binary classifications mostly), cluster analysis (k-means mostly), anomalies finding (z-score), time series analysis (sarimax), etc.