I am Marina de Freitas Lima Oettrich, an experienced Data Scientist with a solid foundation in Statistics from Unicamp, leveraging four years of hands-on experience turning complex data challenges into actionable insights. I am proficient across the entire ML lifecycle, from data engineering to model deployment, with a proven track record of delivering end-to-end solutions. My work includes building scalable ML models with Python on AWS SageMaker and applying LLMs and prompt engineering to real-world tasks. I am seeking opportunities with innovative teams to develop scalable ML solutions, tackle credit risk modeling and data-driven decision making, and continue growing in this dynamic field.

Marina de Freitas Lima Oettrich

I am Marina de Freitas Lima Oettrich, an experienced Data Scientist with a solid foundation in Statistics from Unicamp, leveraging four years of hands-on experience turning complex data challenges into actionable insights. I am proficient across the entire ML lifecycle, from data engineering to model deployment, with a proven track record of delivering end-to-end solutions. My work includes building scalable ML models with Python on AWS SageMaker and applying LLMs and prompt engineering to real-world tasks. I am seeking opportunities with innovative teams to develop scalable ML solutions, tackle credit risk modeling and data-driven decision making, and continue growing in this dynamic field.

Available to hire

I am Marina de Freitas Lima Oettrich, an experienced Data Scientist with a solid foundation in Statistics from Unicamp, leveraging four years of hands-on experience turning complex data challenges into actionable insights. I am proficient across the entire ML lifecycle, from data engineering to model deployment, with a proven track record of delivering end-to-end solutions. My work includes building scalable ML models with Python on AWS SageMaker and applying LLMs and prompt engineering to real-world tasks.

I am seeking opportunities with innovative teams to develop scalable ML solutions, tackle credit risk modeling and data-driven decision making, and continue growing in this dynamic field.

See more

Language

Portuguese
Fluent
Spanish; Castilian
Fluent
English
Intermediate

Work Experience

Credit Data Scientist at Agibank
September 1, 2025 - September 1, 2025
Contributed to credit risk modeling by building data pipelines for training data (SQL extraction from Athena) and transforming data with R. Performed feature engineering for explainable models, conducted exploratory analysis for variable selection, and trained credit default models (in R and SageMaker) to estimate customer default scores and assess the impact of credit granting on those scores.
Data Scientist at Mercado Livre
September 30, 2024 - September 30, 2024
Led analytics initiatives around FAQ/FAQs recommendations, using cluster-based themes and real-time feature extraction to classify user queries. Implemented a microservice API to surface relevant FAQs, improving click-through rates on help pages.
Business Intelligence Analyst at Publicis Brasil
March 1, 2022 - March 1, 2022
Designed and automated ETL processes to structure and securely store advertising campaign information sourced from Google Ads and Facebook Ads APIs, enabling reliable BI reporting and analytics.
Data Science Intern at Cielo
June 1, 2021 - June 1, 2021
Created the training dataset infrastructure for model development, built data pipelines from Cloudera Hue sources using Python, and developed models to estimate offer acceptance, including binary outcomes via logistic regression and decision trees; performed exploratory analysis to support model selection.

Education

Statistics Degree at Unicamp
January 11, 2030 - January 1, 2021
Accounting Degree at Unip
January 11, 2030 - January 1, 2013

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Financial Services, Professional Services, Media & Entertainment, Other