I am a Senior Data Science Expert at illimity Bank, a Google Developer Expert (GDE), and a 2x Kaggle Grandmaster in competitions and notebooks (previously ranked #7 worldwide for competitions). With over 20 years of experience, I specialize in solving complex challenges in banking, finance, and insurance through Machine Learning and AI.
- Large Language Models (LLMs): Recently, I've been focused on fine-tuning Google's Gemma 2 and Gemma 3 models, including techniques like Generative Reward Post-Optimization (GRPO).
- Tabular Data & Deep Learning: Continuing my work on making deep learning more accessible and effective for tabular datasets, often linked to my research and books.
- Authoring: I have authored or co-authored over 15 books on data science and AI, including the "For Dummies" series for Wiley and a book on tabular machine learning for Manning.
- Community & Mentorship: I am a Google Developer Expert (GDE) in AI, Cloud, and Kaggle. I have been a mentor for the KaggleX BIPOC Mentorship Program and frequently speak at international conferences and meetups.
I've written extensively to bridge the gap between complex AI concepts and practical applications. Among my most recent works:
| Book | Publisher | Focus |
|---|---|---|
| Artificial Intelligence For Dummies | Wiley | A comprehensive guide to AI for all levels. |
| Machine Learning For Dummies | Wiley | An introduction to core concepts and algorithms. |
| The Kaggle Book | Packt | A comprehensive guide to mastering data science competitions. |
| Machine Learning on Tabular Data | Manning | Practical techniques for working with tabular datasets. |
I maintain several repositories focused on cutting-edge ML and AI research:
- gemma_from_scratch: Educational implementation of the Gemma 3 architecture.
- kaggledays-2019-gbdt: Workshop materials for GBDT optimization from Kaggle Days Paris.
- Gemma-2-2B-IT-GRPO: Fine-tuning Gemma 2 using Generative Reward Post-Optimization.
- deep-learning-for-tabular-data: A 2025 guide comparing Keras 3 (PyTorch backend) and XGBoost.



