Jeferson Marques
Senior Data Scientist
Goiás, Brazil
Summary
👤
Senior🎓
Top SchoolJeferson Marques is a Senior Data Scientist with eight years’ experience building production-grade fraud prevention and AI systems across fintech and public sector organizations. He has delivered high-precision identity fraud models, end-to-end ML pipelines (Kubeflow/Vertex), and automation that accelerated document processing using OpenAI and Airflow, demonstrating a pragmatic balance between immediate impact and long-term robustness. His work at Stone/Pagar.me achieved 95% precision on identity fraud while keeping false positives low, and at the Tribunal de Contas he combined BERT and tree-based models to recover millions in misclassified public spending. Fluent in Portuguese with advanced English, he codes confidently in Python, SQL and modern ML stacks (TensorFlow, PyTorch, CatBoost/XGBoost, Hugging Face) and mentors junior colleagues across cross-functional teams. Outside work he maintains sharp pattern-recognition skills through strategic online gaming, a pastime he credits for sustaining creativity and team play.
8 years of coding experience
4 years of employment as a software developer
Bacharelado, Computer Science, 8.31, Bacharelado, Computer Science, 8.31 at Instituto Federal de Goiás (IFG)
Portuguese, English
Stackoverflow
1reputation
226reached
1answer
1question
Github Skills (3)
mirai-bot7
here-api6
baduk6
Programming languages (2)
Github contributions (5)
Kinteshi/TCE-GO-AI-Framework
Apr 2021 - Nov 2021
Framework de Inteligência Artificial desenvolvido para o Tribunal de Contas do Estado de Goiás.
Contributions:82 commits, 8 PRs, 53 pushes in 6 months
estadodesenvolvidoartificialframeworkbaduk
Kinteshi/RFEP
Sep 2019 - Mar 2020
Construção de Modelos de Florestas Aleatórias para Aprendizagem de Ranqueamento através de Programação Genética
Contributions:55 commits, 30 pushes in 6 months
aleatprogramagen
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.