A.
Charlotte, NC | Green Card | Open to U.S. remote, hybrid, or on-site roles

Senior Data Analyst
Product & Marketing Analytics
Applied DS/ML

Senior Data Analyst with 12+ years of experience turning SQL-first product, marketing, and operational analytics into revenue, retention, pricing, and process decisions across mobile gaming, banking/fintech, HR-tech, and U.S. staffing. Strong in funnel and cohort analysis, LTV/ROAS, experimentation, executive BI, and stakeholder decision support. Applies practical DS/ML and GenAI/RAG methods to strengthen analytics work in churn, LTV, forecasting, segmentation, and decision-support workflows.

View projectsResumeGet in touch
12+
Years experience
6
Companies
5
Live demo projects
US
Work authorized
Core skills

What I work with

Production background first; portfolio ML and AI tools are shown separately for transparency.

Product & Marketing Analytics

Funnel analysisCohort analysisRetentionLTVROASCACARPU/ARPDAUPricingLifecycle analytics

Experimentation & Statistics

A/B testingHypothesis designPower analysisZ-testt-testChi-squareANOVABayesian checks

SQL & Python

PostgreSQLClickHouseMySQLRedshiftpandasNumPyscipystatsmodelsscikit-learn

BI & Visualization

TableauPower BILooker StudioExecutive dashboardsKPI tracking

Data & Deployment

StreamlitGradioFastAPIDockerHugging Face SpacesGitHub ActionsETL/ELTData modelingData quality

Applied ML & GenAI

XGBoostLightGBMSHAPCalibrationThreshold tuningLangChainChromaDBOpenAI APIRAGRAGAS
Portfolio

Featured public projects

All projects
Machine LearningTelecom

Telecom Customer Churn Prediction

Calibrated churn scoring workflow with threshold selection, SHAP explanations, lift analysis, and a live Streamlit deployment. Built to show how retention teams can rank customers before outreach.

Verified result

ROC-AUC 0.8397, PR-AUC 0.6551, recall 0.9278 at threshold 0.12.
PythonLightGBMScikit-learnSHAPStreamlit
Case studyDemoRepo
Product AnalyticsExperimentation

A/B Test Analyzer

Product experimentation app covering data validation, hypothesis testing, confidence intervals, Bayesian checks, power analysis, and rollout guardrails.

Verified result

Conversion increased from 42.0% to 66.0% (+24.0 pp, p=0.008026).
PythonSciPystatsmodelsStreamlitPower Analysis
Case studyDemoRepo
Applied AIHealthcare

Medical Q&A RAG Assistant

Source-grounded medical RAG assistant with citations, safety fallback behavior, RAGAS evaluation, and inference-only Hugging Face deployment.

Verified result

RAGAS answer relevancy 0.9644 and context precision 0.9278 across 20 questions.
PythonGradioLangChainChromaDBRAGAS
Case studyDemoRepo

Each featured project has a live demo, GitHub repository, verified result, and public case study. Recruiter codes are optional and only help attribute portfolio visits.

Business impact

Resume-backed outcomes

Figures here are limited to metrics supported by the resume/profile source material.

~40%
reporting reduction
Legacy Staffing operations analytics
~70%
reporting reduction
Sberbank BI and reporting built from scratch
28 -> 6 days
time-to-hire
Sberbank highest-volume role
100K+
candidates per year
Sberbank recruiting analytics scale
Experience

Where I have worked

Nov 2023 - Present
Senior Data Analyst
Legacy Staffing
  • -Built and automated a Tableau dashboard suite for daily leadership decisions across recruitment funnels, fill rate, time-to-fill, billable headcount, recruiter productivity, and revenue/margin; reduced manual reporting by ~40% (~30 hours/week) across funnels processing 1,000+ candidates/month.
  • -Identified bottlenecks across 6 hiring pipelines using advanced SQL on AWS Redshift; helped reduce average time-to-fill from ~5 to ~4 days and supported projected recruiter productivity savings of ~$80K/year.
SQLAWS RedshiftTableauETL
Jan 2022 - Mar 2023
Analytics Team Lead, Marketing
G5 Entertainment
  • -Led a 5-person analytics squad supporting a live portfolio of 10+ mobile titles with ~6M MAU and ~$140M in annual revenue.
  • -Supported UA teams managing ~$30M+/year across Meta, Google, and Unity Ads with LTV, ROAS, retention, and cohort analysis.
SQLPythonAWS RedshiftLightGBM
Jul 2017 - Jan 2022
Analytics and Data Lead - HR Tech
Sberbank (Sber)
  • -Led analytics and data for HR-tech recruitment at a bank with ~280K employees, coordinating a matrixed team of ~5 and supporting ~100K+ candidates/year.
  • -Supported recruitment digitalization for the highest-volume role with funnel analytics and experimentation, helping reduce time-to-hire from 28 to 6 days.
SQLPythonTableauTime Series
Apr 2016 - Jul 2017
Analyst, Marketing
Societe Generale Insurance
  • -Automated sales monitoring and KPI calculations and built salesperson-level dashboards for recurring insurance reporting.
  • -Analyzed campaign and creative effectiveness and supported tariff optimization and commercial budgeting decisions.
SQLExcelMarketing AnalyticsKPI Reporting
Available for interviews

Let us talk about the data problem behind the dashboard.

I am open to Senior Data Analyst, Senior Product Analyst, Data Scientist, Analytics Engineer, and Applied AI / GenAI Analytics roles in the U.S.

Contact AndreyReview projects