Open to opportunities

Maryia Maziuk

@maryiamaziuk

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I build trusted data models, standardized metrics, and Tableau reporting that turn business decisions into action.

Poland

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What I'm looking for

I'm looking to build scalable data models, trusted reporting layers, and actionable analytics that help stakeholders make confident business and product decisions.

At Exness, I build dbt and SQL models that turn staging data into reliable datasets for funnel, retention, cohort, ROI, and revenue analysis. I automated budget-versus-actual and ROI reporting, cutting allocation decisions from weeks to days and removing 20+ hours of manual work each week.

I design Tableau reporting used by 300+ stakeholders, improve attribution logic, and help BI teams apply clear visualization and reporting standards. Previously at RJ Games, I built a product reporting layer from scratch and developed retention and payback analysis that supported product decisions and a 2× increase in attracted investment.

Across fintech, mobile games, marketing, and client projects, I translate complex data into practical metrics, reusable models, and visual stories people can trust.

Experience

Work history, roles, and key accomplishments

Senior BI Analyst

Exness

Jan 2022 - Jun 2026 (4 years 5 months)

Built and maintained dbt models for funnel, retention, cohort, ROI, and revenue analysis. Automated budget vs. actual and ROI reporting, cutting manual work by 20+ hours weekly and improving attribution coverage to 100%.

SQL DBT Tableau Data Modeling Data Visualization Python Vertica BigQuery Trino Attribution Modeling Stakeholder Management

Tableau Specialist

Inciter.io, YPulse, Cora.life, Analytica Plus

Jun 2019 - Mar 2022 (2 years 9 months)

Delivered public-facing and client-facing Tableau dashboards across research, marketing, and e-commerce domains. Built executive-level visualizations supporting brand benchmarking, KPI tracking, and profitability analysis.

Tableau Data Visualization Geographic Data KPI Tracking

BI Analyst

RJ Games

Sep 2020 - Jan 2022 (1 year 4 months)

Built reporting and visualization layer from scratch, defining key product metrics. Developed cohort-based retention and payback analysis for a mobile game, contributing to a 2x increase in investment.

SQL Tableau R Data Modeling Data Visualization Cohort Analysis Retention Analysis

Marketing Analyst

VL Media & Horato

Sep 2013 - Dec 2019 (6 years 3 months)

Delivered visualization-driven marketing analytics supporting acquisition of 20M+ users. Optimized 1,000+ advertising campaigns and improved ROI through data-driven budget allocation and performance analysis.

SQL Tableau Data Visualization ROI Analysis Retention Analysis Campaign Optimization Event Tracking