David Damian Arbeu

Hello, I'm

David Damian

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“Guided by the belief that, together, we can build better data and AI problem solutions that could enhance people’s lives.”

01. About Me

I'm an Applied Mathematician turned Data Scientist, with a M.Sc. in Data Science from ITAM — the top-ranked Data Science program in México. I specialize in delivering end-to-end data science solutions — from feature engineering and predictive modeling to scalable cloud deployment — translating complex data into actionable strategies that drive measurable business impact.

My work spans credit risk modeling, causal inference, deep learning (LSTM, transformers), classical ML (XGBoost, LightGBM), and data engineering on cloud platforms like AWS and Snowflake. I thrive at the intersection of mathematics, statistics, and business impact.

Experienced in delivering end-to-end data science solutions — from business problem understanding to data engineering, modeling, and scalable deployment — driving strategic decisions and optimizing KPIs across the retail and fintech industries.

0+ Years Experience
0 Industries
0M+ MXN Revenue Impact

02. Skills & Tech Stack

Machine Learning & AI

  • XGBoost
  • LightGBM
  • Scikit-learn
  • LSTM / RNN
  • Transformers
  • PyTorch
  • TensorFlow
  • Feature Engineering

Data Engineering

  • SQL
  • Snowflake
  • Apache Spark
  • Airflow
  • dbt
  • ETL Pipelines
  • Polars
  • Pandas

Cloud & MLOps

  • AWS SageMaker
  • S3
  • Lambda
  • Docker
  • CI/CD
  • MLflow
  • Git
  • Linux

Analytics & Visualization

  • Python
  • R
  • Matplotlib
  • Plotly
  • Tableau
  • Power BI
  • Statistical Modeling
  • A/B Testing

03. Personal AI Lab

Recommendation System via Offline RL

Recommendation System via Offline RL

End-to-end book recommendation engine using an Actor-Critic agent trained on the GoodBooks-10k dataset. Leverages GRU embeddings and offline RL techniques to optimize long-term user engagement without online exploration.

  • PyTorch
  • Actor-Critic
  • Offline RL
  • GRU
  • FAISS
LLM Fine-Tuning via RLHF

LLM Fine-Tuning & Calibration via RLHF

Fine-tuned a LLaMA model with LoRA and calibrated its behavior using a Reinforcement Learning from Human Feedback (RLHF) agent for deceptive text detection.

  • LLaMA
  • LoRA
  • RLHF
  • Hugging Face
  • PyTorch

04. Experience

September 2024 — Present

Sr. Data Scientist → Lead Data Scientist

RappiCard México · México City, MX

January 2024 — May 2024

Data Scientist Consultant

PhiQus Data Science · México City, MX

October 2023 — December 2023

Jr. Data Scientist Consultant

ENKI · México City, MX

05. Education

August 2022 — August 2024

M.Sc. in Data Science

Instituto Tecnológico Autónomo de México (ITAM) · México City

August 2016 — December 2021

BASc. in Applied Mathematics

Universidad Autónoma del Estado de Hidalgo (UAEH)

  • Mérito Académico: Top graduate at UAEH, awarded for academic excellence with the highest GPA in my cohort.
  • Mérito Garza: Recognized for excellence in the General Exam for Undergraduate Graduates (EGEL).
David Damian receiving the Mérito Académico award
2025

Applied Deep Reinforcement Learning

Colegio Bourbaki

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06. Get in Touch

I'm always open to discussing new opportunities, interesting projects, or ways we can collaborate on data & AI challenges.

Mexico City, Mexico

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