Walter Ullon

Work & Projects

Building at the Intersection of Data, ML, and AI

From epidemiological models to enterprise ML platforms to AI-native developer tooling: here's what I've been building.

Technical Domains

The four areas where I operate and deliver impact.

🧠

ML & Forecasting

Supervised ML Time-Series Forecasting XGBoost LightGBM CatBoost MLflow Feature Store Optuna SHAP Bayesian Inference PyMC NLP Anomaly Detection Model Monitoring
⚙️

Data Platform Engineering

Python SQL PySpark Delta Lake Databricks Redshift dbt Great Expectations Medallion Architecture Unity Catalog Delta Sharing FinOps
🤖

AI-Native Developer Tooling

Claude Code MCP Servers AI Agents LLM Orchestration Knowledge Graphs Doc Automation Workflow Design Automated Lineage
🚀

Software, Product & Delivery

Pydantic SQLAlchemy pytest Streamlit Jira Roadmap Ownership Technical Writing CI/CD

Projects

Selected Work

Research & Publications

Early Warning Signals

Epidemic Early Warning Signals

Designed a control-theory framework to suppress epidemic extinction risk. Published in the International Journal of Chaos and Dynamics.

Applied Math Population Dynamics Epidemiology

Data Analysis

Recession Indicators — Housing

Recession Early Warning System

Applied Shewhart control charts to housing index data to detect pre-recession signals 3–6 months ahead of consensus estimates.

Python Statistical Process Control
Sahm Rule

Sahm Rule & Labor Market Analysis

Reproduced and extended the Sahm Rule recession indicator using BLS unemployment data, with sensitivity analysis across demographic segments.

Python Economics

Productivity & Templates

Notion PM Template

PM Discovery Framework

A Notion template for structuring discovery cycles, OKR alignment, and roadmap prioritization. Used by 100+ product managers.

Product Management Notion