Selected work and field notes
I'm David, a technical builder in DeKalb, Illinois. My work moves between web interfaces and security research, with a steady focus on turning messy problems into something people can inspect, use, and continue.
Selected work
Small enough to inspect, specific enough to show how I think. Each piece links to the actual record or writeup.
Checked-in interface capture · current route behavior not assertedA focused English-and-Spanish website flow that helps visitors understand the work, estimate a project, and carry that context into a quote request.
Published page captureA step-by-step account of turning an unbounded scanf into a heap task overwrite when the usual control-flow shortcuts were unavailable.
Published page captureA forensic walkthrough that combines fragmented payment-card records, reconstructs missing digits with Luhn checks, and separates legitimate chip use from magstripe fraud.
My approach
I enjoy the moment when a complicated system starts to make sense. The process is practical: observe, make a clear choice, test it, and write down what matters.
I start with the page, workflow, source, or evidence that actually exists. The right change usually becomes clearer once the real surface is understood.
A polished result matters, but so does the reasoning behind it. I explain what I chose, what I left out, and why.
I document enough for another person—or future me—to inspect the work and continue without reconstructing the whole story.
Usually working with
How should AI agents prove what they were actually authorized to do?
What makes a technical handoff easy for the next person to trust and continue?
How can a small web experience feel simpler without hiding the decisions underneath it?
Say hello
Work, collaborations, and thoughtful technical conversations are always welcome.