Technical Co-founder at stealth cybersecurity AI infrastructure startup

Job Description

Company: Jack & Jill

Location: London, GB

This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers.
She will pick the best candidates from Jack’s network.

The next step is to speak to Jack.

Job Title
Technical Co-founder

Salary
Not Disclosed

Company Description
Stealth cybersecurity AI infrastructure startup
Job Description
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.

Location
London, UK / Barcelona, Spain

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.

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.

The ideal candidate

• 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.

Who are Jack & Jill?
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.
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.
Next steps
Step 1. Visit the job listing.

Step 2. Click
‘Talk to Jack’
, or go straight there: https://www.jackandjill.ai/jobs/technical-co-founder-at-stealth-cybersecurity-ai-infrastructure-startup-cb8fd01a-4c1c-4eb3-bbe1-5c0e9c2531d5/apply?utm_source=linkedin&utm_medium=job_post&utm_campaign=featured_role_cb8fd01a-4c1c-4eb3-bbe1-5c0e9c2531d5

Step 3. Talk to Jack so he can understand your experience and ambitions.

Step 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role.

Step 5. If Jill thinks you’re a great fit and her client wants to meet you, they will make the introduction.

Step 6. If not, Jack will find you excellent alternatives. All for free.

We never post fake jobs
This isn’t a trick. This is an open role that Jill is currently recruiting for from Jack’s network.

Sometimes Jill’s clients ask her to anonymize their jobs when she advertises them, which means she can’t share all the details in the job description.

We appreciate this can make them look a bit suspect, but there isn’t much we can do about it.

Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we’re giving his services away for free.

Source: BeBee