Hellen Lima
Lead Data Scientist
Rio de Janeiro, Brazil
Summary
🤩
Rockstar🎓
Top SchoolHellen Lima is a Lead Data Scientist based in Rio de Janeiro with nine years of experience applying machine learning across finance and consumer marketing at scale. At Nubank she leads credit foundations and previously built ranking and orchestration models to personalize promotional communications, driving measurable uplift in campaign metrics. Her background spans NLP, embeddings for customer feedback, unsupervised segmentation, time-series forecasting and fraud detection from roles at fintechs and consultancies, and she has applied ML in high-stakes contexts including COVID forecasting for corporate decision-making. Early research and internships at CERN and UFRJ gave her a strong signal-processing and neural-network foundation, informing a pragmatic approach to loosely defined business problems. She combines technical leadership with hands-on modelling and experimentation, often translating research techniques into production-ready solutions that improve customer experience and ROI.
9 years of coding experience
10 years of employment as a software developer
Bachelor’s Degree Electronic and Computer Engineering, Bachelor’s Degree Electronic and Computer Engineering at Federal University of Rio de JaneiroHigh School Technical Course on Telecommunications, High School Technical Course on Telecommunications at Cefet/RJ - Centro Federal de Educação Tecnológica Celso Suckow da FonsecaBEng Electronic Engineering and Telecommunications, BEng Electronic Engineering and Telecommunications at Queen Mary University of London
Portuguese, English
Github Skills (17)
syntax-highlighting9
jupyter-notebook8
jupyterlab-extension8
css8
jupyter8
jupyterlab7
classifier7
machine-learning7
python7
data-analysis6
lime6
notebook6
data-science6
ml3
lorem-ipsum2
Programming languages (5)
Github contributions (5)
hellenlima/unsupervised-learning-basics
Jan 2020 - Jul 2020
Contributions:11 commits, 10 pushes, 1 branch in 6 months
hellenlima/NN_unsup
May 2017 - Dec 2017
Contributions:16 pushes, 1 branch in 7 months
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