Joseph Thacker

@rez0__

Full time bug bounty hunter, AI red teamer, and startup advisor. 1,000+ vulnerabilities reported. Google Most Valuable Hacker award winner. Speaker at BlackHat and DEFCON AI Village. Co-host of the Critical Thinking Bug Bounty Podcast.

Background

I've submitted over 1,000 vulnerabilities across HackerOne and Bugcrowd, including critical findings in Google, Microsoft, and dozens of Fortune 500 companies. I was recognized with Google's Most Valuable Hacker award at live hacking events and multiple "Best Team" awards at HackerOne competitions.

I offer consulting in two areas: AI consulting (implementation guidance and security assessments) and startup advising for high-velocity companies needing technical leadership with deep networks in AI and security.

Previously I was a Principal AI Engineer building production AI tools and workflows. I'm hands-on with the latest models and techniques — Claude, GPT-4, prompt engineering, and custom AI application development.

On a personal note, I'm a Christian, husband, and father. Outside of work I enjoy AI art, running, podcasts, and key lime pie.

Advisory & Board Roles

Trusted by builders.

Ethiack — Advisor Starstrike AI — Advisor Caido — Advisor HackerOne — Hacker Advisory Board SPLX — Former Advisor acquired Cornerstone Haiti — Board Member

Speaking

Conferences & Talks

BlackHat USA

Presented research on AI security vulnerabilities and LLM exploitation techniques.

DEFCON AI Village

Spoke on the intersection of AI safety and application security testing.

TEDx

Talked about the future of human creativity in an age of artificial intelligence.

Press & Media

Featured in

Forbes WIRED TechRepublic VentureBeat Dark Reading

Podcast

Critical Thinking Bug Bounty Podcast

The #1 bug bounty podcast. Co-hosted with Joel Margolis, covering hacking techniques, AI in security, and the bug bounty lifestyle.