This Shopware 6 plugin is used to monitor important e-commerce metrics with koality.io.

A hands-on lab showing how “improving” a single metric (AUC/accuracy/F1) can worsen real-world outcomes. Includes metric audits, slice checks, cost-sensitive evaluation, threshold tuning, and decision policies you can defend, so dashboards don’t quietly ship bad decisions.

Análise de dados aplicada a transações comerciais para geração de insights estratégicos e apoio à tomada de decisão / Data analysis applied to commercial transactions to generate strategic insights and support decision-making

Used Excel to analyze financial performance data of 500+ companies on the NYSE. Based on my findings, I created Profit/Loss Statements and Financial Forecasting Models using multiple scenarios

A reusable Laravel 10+ package that lets you annotate any service method with a PHP attribute to collect custom telemetry (e.g. user counts, disk usage, feature flags) and automatically report it—at configurable intervals—to a central server over HTTP.

Cohort and marketing analysis of Yandex.Afisha data (CAC, LTV, ROMI, payback, retention).

This project showcases my analysis of real-world financial data from the New York Stock Exchange (NYSE). I worked with a dataset from Kaggle, which includes historical financial information on companies in the S&P 500.

Growth funnel reporting system measuring acquisition, activation, conversion, and retention through SQL transformation, curated analytical datasets, and executive reporting.

Marketplace reporting system for customer, seller, and product performance using SQL transformation, dimensional modeling, and Power BI executive reporting.

Executive reporting system focused on governed business metrics, dimensional modeling, semantic reporting, and engineering documentation for consistent KPI reporting.

cleaning and analyzing sales data to show themain insights and metrics that can help the managers to take their decision using excel and power BI

Data analysis of real-life data, calculation of Summary Statistics and Business Metrics, creation of Profit & Loss Dashboards and Financial Forecasting of the New York Stock Exchange (NYSE) Data, with a focus on IBM.

My Yandex.Practicum projects

Customer churn prediction with business-driven threshold optimization. ROC-AUC 0.85

Create, validate, score and export business metric contracts for analytics engineering governance.

Cohort retention analysis for e-commerce — monthly retention heatmap, business insights, and recommendations.

End-to-end churn ML platform: calibrated XGBoost/LightGBM, CLV-weighted business metrics, decile lift, segment analysis, SHAP drivers, and an interactive campaign ROI simulator. Live Streamlit demo.

SQL-based analysis of financial transactions to calculate KPIs and build an interactive business dashboard.

Performed a full churn analysis for Fit.ly Tech, a subscription-based fitness app.

Machine Learning in Business project for TripleTen