Security Engineer (£70k–£120k + Equity) at well-funded AI security startup

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

Security Engineer

Salary

£70k–£120k + Equity

Company Description

Well-funded AI security startup

Job Description

Join an elite team as the founding security engineer building critical infrastructure for autonomous systems. You will lead the development of secure AI frameworks, ensuring integrity and safety across production models. This high-impact role offers significant autonomy to shape technical strategy and evolve into a leadership position as the organization scales rapidly.

Location

London, UK

Why this role is remarkable

Join as the first engineering hire with a direct path to CTO as the company grows.

Backed by top-tier venture capital firms and recognized by leading global AI research labs.

Work alongside a founding team with deep technical pedigree from institutions like NASA and MIT.

What You Will Do

Design and implement robust security protocols for large-scale autonomous AI deployments.

Develop automated systems to detect and mitigate adversarial attacks on production models.

Architect scalable security infrastructure that integrates seamlessly with modern AI development workflows.

The ideal candidate

Strong background in cybersecurity, application security, or AI/ML systems (0-3 years post-university).

Experience in offensive or defensive security research, specifically targeting prompt injection or model vulnerabilities.

Proactive builder mindset with a track record of shipping production-grade code or contributing to significant open-source projects.

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.

How does this work?

Jill is the AI recruiter working for the company. She recruits from Jack's network.

If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.

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.