Join as a technical co-founder to build the security layer for agentic AI from the ground up. You will lead the development of enterprise-grade infrastructure, including API integrations, telemetry agents, and threat detection engines. This is a true founding role for a builder ready to own the entire technical roadmap and architecture.
Back to all jobsSee Open Roles
Learn about Jack
This job is no longer actively hiring. Open Roles to see active jobs.
Technical Co-founder at stealth cybersecurity AI infrastructure startup
We are seeking a technical co-founder to build the security layer for agentic AI—the next major platform shift in enterprise software. With letters of intent from nearly 100 enterprises and a fundraising round in progress, this is a unique opportunity to join as a true partner from day zero. You will own the architecture, choose the stack, and ship the MVP that defines how the world secures autonomous agents. If you are a systems-driven engineer who loves building infrastructure from the ground up, this is your chance to create a category-defining company.
Want to apply for this role?
C
This role is no longer actively hiring, but Jack can still help you discover similar open roles that fit.
Location
London, United Kingdom
Compensation
Not Disclosed
Company
Confidential company
Role overview
About the company
Stealth cybersecurity AI infrastructure startup
What you will do
- Design and build the core platform from scratch, including real-time data pipelines and SIEM-like data stores.
- Architect and ship the MVP that integrates with enterprise AI orchestration layers to secure autonomous agents.
- Make all critical technology stack choices and lead the engineering direction as the company scales from zero to one.
Who this is a fit for
- Proven track record of writing production code and building complex data pipelines or observability platforms from zero.
- Systems-thinker who thrives in a founding environment and is comfortable with equity-only commitment pre-fundraising.
- Experience in infrastructure or backend engineering; while security knowledge is a bonus, the ability to ship fast is essential.
Why this role is remarkable
- Significant equity stake and equal co-founder status in a venture targeting the massive AI infrastructure security market.
- Validated demand with letters of intent from early enterprise customers and a fundraising round closing within months.
- Direct partnership with founding members bringing deep cybersecurity operations and enterprise sales expertise to the table.
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
I recruit from Jack’s network and make the intro when I spot a great match.And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
Jack gets to know what you're great at and what you want next, then searches 15 million jobs daily and helps you discover roles at companies like this.
Meet Jack
What happens next?
Jack’s an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack’s network.
If your profile’s a match and Confidential company wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.