Data Analyst · Lisbon, Portugal
David
Hernández
Python · SQL · Power BI · Tableau · Machine Learning
Decisions driven by data, delivered with clarity.
Decisions driven by data, delivered with clarity.
Business Intelligence & Predictive Analytics
End-to-end ML and analytics project analyzing 3,495 animated TV shows across 72 years of industry history. Combined EDA, feature engineering, and predictive modeling to identify the factors most associated with success — across genres, techniques, eras, and countries.
Machine Learning Product Development
XGBoost-powered Streamlit app that evaluates animated show concepts against 74 years of data — combining IMDb ratings, Amazon toy demand, Netflix reach, and YouTube organic signals to predict franchise potential with a 0–50% probability score.
Dashboarding, Storytelling & Data Visualization
End-to-end data analytics project analyzing 25 years of electricity generation across Europe. From raw dataset to two interactive dashboards — Tableau and a custom HTML/CSS build — surfacing insights on renewable adoption, fossil fuel dependency, and energy independence.
Marketing Analytics & Engagement Modeling
End-to-end ML project modeling audience engagement across 925 videos in YouTube's lofi/study niche. Detected and eliminated data leakage that inflated R² from a misleading 0.49, then rebuilt performance to an honest, generalizable 0.37 with XGBoost and channel-authority features — and turned the insights into custom binaural beat audio for experimental testing.
Everything in this world is backed by data — the restaurants we dine at, the games we play, the clothes we wear. Analysis has always been part of the game. What changes are the tools we use to play it.
10 years in IT operations and project management taught me how organizations work from the inside. Now I use that perspective to find what the data is actually saying — and make sure organizations are prepared to act on it.
I got into data analytics because I want to help organizations reach their goals. Trust me with your data, and I'll turn it into clarity, direction, and better decisions.