Juan Esteban Berger

Juan Esteban Berger

Data Engineer

About Me

I am an Applied Mathematics and Statistics MSc graduate who is passionate about machine learning, mathematics, and data science. With experience in cloud technologies, data visualization, and automation, I'm always excited to tackle challenging projects that create real impact.

Work Experience

Data Engineer

Grupo Disresa, Guatemala City, Guatemala | Aug 2023 - Present

  • Built and optimized ETL pipelines for 300,000+ SKUs across 8 brands in 6 countries, ensuring timely and accurate data availability for stakeholders.
  • Established a PostgreSQL data warehouse integrating data from SQL Server, BigQuery, and MongoDB, including data modeling and normalization, to enhance data accessibility and analytics.
  • Created data visualisation dashboards.

Graduate Teaching Assistant

University of Notre Dame, Notre Dame, IN | Aug 2022 - Dec 2022

  • Assisted with "Introduction to Probability" and "Statistical Learning for Data Science."

Equity Research Intern

New York, NY | Jun 2022 - Aug 2022

  • Analyzed financial statements to identify investment opportunities, creating financial models and Python visualizations to support data-driven decisions.
  • Redesigned Excel-based tools to streamline investment analysis processes, resulting in improved accuracy and faster reporting, and utilized Bloomberg Terminal to gather key financial metrics.

Projects

MicroKeras: Minimal Deep Learning Library

A minimal implementation of the Keras Sequential model and Dense Layer classes, built from scratch using Python and NumPy.

Docs GitHub Colab Demo

S&P 500 Data Engineering Project

Built data pipelines using Apache Airflow and Docker to store financial data in PostgreSQL. Developed three data visualization dashboards, one using Streamlit, one using Tableau and and one using React and Django.

GitHub Streamlit Dashboard Tableau Dashboard React Dashboard

Education

University of Notre Dame

M.S. in Applied and Computational Mathematics and Statistics

2022-2023

University of Notre Dame

B.S. in Applied and Computational Mathematics and Statistics

Minor in Actuarial Science | 2018-2022

Certifications

Google Cloud Professional Machine Learning Engineer

View Certificate

Google Cloud Professional Data Engineer

View Certificate

Technical Skills

Programming Languages

Python, SQL, C++, Java, JavaScript

Libraries / Frameworks

Pandas, PySpark, SciKit-Learn, PyTorch, Django, React, Tailwind CSS

Databases / Datawarehouses

PostgreSQL, SQL Server, MongoDB, BigQuery, Hive

Data Visualization

PowerBI, Tableau, Streamlit, Plotly Express

Tools / Platform

Docker, Kubernetes, Apache Airflow, Linux, Neovim