Hello, I'm Will Charles

> Data engineer & ML Enthusiast

About Me

I have a Master's in Computer Science (Data Science) and a background in discrete math. Most of what I enjoy about this work happens before the modelling: collecting data, figuring out what's actually in it, and getting it into a shape where a question can be answered.

I co-founded an eCommerce company, where I built the data systems we used to make decisions and keep operations from falling over. That's where I learned that the useful answer is usually the one someone can act on, not the one with the best score.

The projects below try to show the process rather than just the results, including the parts that didn't work. Always happy to talk!

My Portfolio

Retail Sales Forecasting

A multi-stage pipeline using OLS regression and SVD denoising to forecast weekly sales across 45 Walmart stores.

House Price Prediction

I cleaned and analyzed housing data, then used XGBoost and ElasticNet to predict home sale prices

Movie Sentiment Analysis

Predicting movie review sentiment, then learning a linear map between two embedding spaces to work out which sentences drove the call.

Reproducing CASS for Brain Tumor MRI Classification

Brain Tumor MRI: CASS Reproduction

Trying to reproduce CASS, a self-supervised CNN+ViT method, on a brain tumor MRI dataset the authors never used. Some of it held up, some didn't.

Global Energy Narrative

A brief Narrative Visualization to examine and explain the relationship between a country's energy usage and income per capita.

Global Econ Dashboard

An interactive Tableau dashboard visualizing global trends in energy consumption and economic development.

Live Job Market Dashboard

A daily batch pipeline using Python for ingestion, Postgres for storage, and a tested dbt star schema. Twice daily, this site is rebuilt with the job postings from thousands of career pages

Gradient Descent Golf

Nine holes of optimization. You pick a club and a step size; the ball runs real heavy-ball gradient descent down a real loss surface.

The AI Psychosis Test

Twenty items on one axis, from "it's autocomplete" to "it's somebody." A joke instrument, no data collected, and emphatically not a diagnostic.

Contact Me

I'm looking for data engineering and ML roles, remote or in the San Francisco Bay Area. If something here lines up with what your team is working on, please reach out!