Hackbot R&D

I’m a researcher working at the intersection of artificial intelligence and computer security. I work at Dreadnode training and evaluating the hacking capabilities of agents. I’ll be working in this field until we see hacking’s move 37.
Shane Caldwell

Intro to GPUs For the Researcher

Getting comfortable with the hardware on a quest for more MFU.

January 5, 2026 · 31 min · 6553 words · Shane Caldwell

All Reduce Across the Atlantic: Bandwidth in Decentralized Training

The practical realities of devestatingly high communication cost in training.

December 12, 2025 · 17 min · 3551 words · Shane Caldwell

Twenty Billion Tokens of What, Exactly?

Looking at the data and letting it look back at us.

December 1, 2025 · 23 min · 4761 words · Shane Caldwell

The Input Sanitization Perspective on Prompt Injection

So, you mixed user input and instructions.

July 2, 2023 · 23 min · 4772 words · Shane Caldwell

Deep Reinforcement Learning for Security: Toward an Autonomous Pentesting Agent

A manifesto on RL in cybersecurity, from when deep RL was the thing.

April 28, 2020 · 29 min · 6176 words · Shane Caldwell

An ML Eng's Review of OSCP

Because you shouldn’t try and automate anything you can’t do yourself.

April 26, 2020 · 16 min · 3343 words · Shane Caldwell