📍 São Paulo, Brazil | 🌐 Open to Remote Opportunities
I turn messy data into clear business decisions. Specialized in Python automation, SQL querying, and visual storytelling with dashboards that actually get used.
Currently deepening my expertise in Advanced Data Science, focusing on time-series forecasting and predictive modeling with neural networks.
Recent impact:
✅ Automated 15h/week of CFO reporting → Python + SQL + Streamlit
✅ Deployed churn predictor with 82.65% accuracy → Reducing customer loss
✅ Built real-time geopolitical monitoring system → Playwright + Async Python
💼 Looking for opportunities in: Data Science, ML Engineering, Business Intelligence
📩 Let's connect: LinkedIn | rafacasella@gmail.com
- B.S. in Computer Engineering
- Postgraduate in Data Science, Machine Learning & AI — In Progress
From Raw Data to Business Action
- 🔍 Discover — Ask the right questions before touching data
- 🧹 Clean — Pandas + SQL to turn chaos into structure
- 📈 Analyze — Statistical tests, trend analysis, cohort breakdowns
- 📊 Visualize — Dashboards that executives actually understand
- 🤖 Automate — Python scripts that run while you sleep
My edge: I don't just deliver reports. I deliver insights that change decisions.
Problem: Manual Excel reports taking 3h daily
Solution: Python ETL + Streamlit Framework
Impact: 15h/week saved, real-time data instead of daily
🔗 View Project | Python, Pandas, StreamLit
Problem: High monthly churn with no early warning system
Solution: Logistic regression model with 82.65% accuracy
Impact: Retention team now contacts at-risk customers proactively, improving retention rates
🔗 View Project | StatsModels, PostgreSQL, Seaborn
Problem: Difficult manual tracking of statements impacting the global economy
Solution: Playwright scraper
Impact: Stealth real-time pipeline to monitor geopolitical mentions
🔗 View Project | Playwright, Urllib, Asyncio
Beyond code and data, I'm passionate about:
- 📊 Analyzing financial markets and managing my investment portfolio
- 🤖 Exploring the intersection of AI and economics
- 🌍 Studying macroeconomic trends and global financial markets
When I'm not optimizing models, I'm optimizing time with my family.
- 📧 Email: rafacasella@gmail.com
- 💼 LinkedIn: linkedin.com/in/rafael-casella-490457368/
- 🌐 Portfolio: https://rafacasella.github.io/