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Bruna User

@brunauser1

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Analytics Engineer and Data Engineer with strong data science background, building scalable pipelines and models.

Brazil

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What I'm looking for

I am seeking roles where I can build scalable, reliable data pipelines and models, collaborate cross-functionally, and drive measurable business impact in a data-driven culture.

I am an Analytics Engineer and Data Engineer with a strong foundation as a Senior Data Scientist, focused on designing robust, scalable data pipelines and models that drive business impact.

Throughout my career I have delivered end-to-end solutions across finance, retail, healthcare, and agribusiness, improving ML performance, data quality, and operational efficiency.

Notable achievements include implementing a Medallion Architecture that improved ML performance by 50%, consolidating dashboards via star schemas to reduce memory usage by ~60%, and building data validation with Great Expectations to block incorrect ingestion.

I prioritize data reliability, collaboration with cross-functional teams, and automating workflows (dbt, Airflow, CI/CD) to accelerate feature delivery and enable data-driven decisions.

Experience

Work history, roles, and key accomplishments

Current

Analytics Engineer

Current

Stone

Aug 2025 - Present (6 months)

Implemented a Medallion Architecture and dbt/Airflow pipelines to productionize ML features, improving model performance by 50% and consolidating dashboards to reduce memory usage ~60%.

DBT Airflow SQL Tableau Python Data Modeling Data Quality

Analytics Engineer

Mars

Jan 2024 - Jul 2025 (1 year 6 months)

Developed ROI and optimization models for sales-rep store visits leading to projected revenue uplifts (UK 3%, US 7%) and increased high-potential visits by 10% through constrained optimization and A/B testing.

Python Databricks Experiment Design ROI Optimization SQL Data Integration A B Testing

Data Engineer

QuantumBlack - McKinsey & Company

Jan 2023 - Jan 2024 (1 year)

Designed pipelines and feature engineering for financial-crime detection models, reducing false positives by 30% and implementing Great Expectations validations to ensure data quality.

Python Great Expectations Data Pipelines CI CD Unit Testing Fuzzy Matching

Data Scientist

QuantumBlack - McKinsey & Company

Mar 2020 - Jan 2023 (2 years 10 months)

Delivered production ML models across banking, marketing, product, and compliance; mentored peers and translated business needs into end-to-end analytics solutions driving data-informed decisions.

Machine Learning Python Stakeholder Management Mentoring Statistical Modeling Cross Functional Collaboration

Data Scientist

Open Co

May 2018 - Mar 2020 (1 year 10 months)

Built the first credit-delinquency predictive model enabling same-day loan decisions and reduced approval time by 3 days; implemented collection strategy A/B tests cutting unproductive calls by 20%.

Credit Models NLP A B Testing Python Statistical Modeling Data Integration Model Evaluation

Data Scientist

Marketdata

Jun 2016 - May 2018 (1 year 11 months)

Developed marketing and churn prediction models (decision trees, RFM segmentation) and provided data-driven insights to optimize campaigns and customer retention strategies.

R Statistical Modeling Churn Modeling Data Analysis Machine Learning SQL

Education

Degrees, certifications, and relevant coursework

Universidade de São Paulo

Bachelor of Science, Statistics

Completed a Bachelor's degree in Statistics with coursework covering statistical modeling, data analysis, and probability theory.

Universidade de São Paulo

Master of Science, Computer Science

Completed a Master's degree in Computer Science (coursework only, excluding academic dissertation) focusing on advanced topics in computing and data-driven solutions.