About the role
Antigen builds cybersecurity agents and the infrastructure to safely deploy and scale them in enterprise and government environments. Using open-source models and partnerships with frontier labs, we're pushing the frontier of what cyber agents can do.
We're looking for security researchers to join us full-time in San Francisco. You'll be an expert-in-the-loop - driving our agents into real environments, finding where they break down, and collaborating with our research team to make them more capable.
Day to day, this means deploying our agent (tCell) against complex systems, observing how it chains attacks and where it gets stuck, stepping in where it lacks understanding, and turning that into research that improves the agent. You should be a strong offensive security practitioner who's genuinely curious about how AI agents behave in adversarial settings.
We're backed by YC, Lightspeed, Susa Ventures, and DST Global.
About Antigen
Continuous offensive security for the enterprise.
Required skills
Refer someone
Know someone great for this role?
Share your link. If they get hired through Standout, you get $3,000.
Job details
Salary
$150,000 - $220,000
Equity
0.5% - 1%
Location
San Francisco, CA
Experience
1+ years
Funding
Last stage
Seed
Investors
What happens next.
No applications, no recruiter spam. Just the intro.
Confirm the fit
A few questions to make sure this role is the right shape for you. Two minutes.
I pitch you to the company
I write the intro, send it to the founder, and handle the back-and-forth.
A meeting lands on your calendar
If they’re a yes, I book the chat. You show up — that’s the whole job-hunt.