Master's in Business Analytics & Data Science at IE University of Science and Technology, last term, specializing in Advanced AI.

My projects don't follow a single theme: I've built a Bayesian model for predicting box office outcomes, a real-time crypto pipeline, a deployed Streamlit app for expense tracking, and a 2D platformer game. I just tend to go deep on whatever I find interesting at the time.

Languages: Python, SQL
ML / AI: scikit-learn, PyTorch, pgmpy, Hugging Face, LangChain
Data Engineering: Apache NiFi, MinIO, pandas, NumPy
MLOps: modular pipelines, pytest, GitHub Actions
Visualization: Streamlit, Power BI, Tableau, Matplotlib, Seaborn
Other: Pygame, REST APIs, Git

• Hermes - AI European Travel Planner
  AI travel agent that builds personalised multi-city European itineraries. Scores 80 European cities using a proximity-aware scoring system (activity match, budget fit, seasonality, and geographic routing from your departure city), estimates transport across flights, trains, and buses, pulls live Wikipedia descriptions and Open-Meteo weather data, and generates a 12-month pricing calendar. Runs fully locally using Ollama (llama3.1:8b) with no paid API keys required. Built with Python, Streamlit, LangChain, and Plotly. 90 automated tests.

• The Blockbuster Formula
  Bayesian Network model predicting box office outcomes (Flop to Blockbuster) on ~2,900 films from TMDb (2000-2024). Full pipeline: API collection, feature engineering (actor prestige scoring, budget tiers, release windows), EDA, probabilistic inference, and a baseline ML comparison (logistic regression + random forest).

• Datathon 2025 - 1st Place 🏆
  Won a time-bound datathon analyzing aviation traffic and CO2 emissions across European airspace using EUROCONTROL data (2010-2025). Built in Python with Tableau dashboards, identified trends between flight activity and environmental impact under competition conditions.

• Budget Calculator: Exchange Edition
  Live Streamlit app for tracking spending across countries and currencies. Started as a personal tool during my winter 2024 exchange in Budapest, rebuilt in 2026 with multilingual support (EN/FR/ES), geographic spend maps, file import/export, and multi-currency conversion.

• MLOps Training Pipeline
  Modular ML system with clean data/training/evaluation separation, full test suite, and CI integration, built to work like something you'd actually maintain.

• Personal Finance Analytics Package
  Python package for personal finance tracking with a companion Streamlit front-end.

• Crypto Streaming Analytics
  Real-time pipeline using Apache NiFi + MinIO + Python for ingesting and analyzing crypto streams.

• Pygame Platformer
  2D platformer game. Event loops, collision detection, game state. Built as a pure interest project. Deployed on itch.io https://stefhooy.itch.io/tower-of-ie-the-wizard-climb

Music: EDM, Rock, Indie, Alternative, Jazz, Disco and 80s pop. Huge Queen fan.
Sports: volleyball and basketball.
Also into photography, video editing.

A chess bot trained with reinforcement learning, teaching it to evaluate positions, plan ahead, and make better decisions to win.