You will join an early-stage team building an AI-native platform that automates vulnerability management by applying real-world attacker logic. As a full-stack generalist, you’ll work across Python and React to build agentic AI systems that investigate security risks, trace root causes, and ship automated guardrails for engineering teams.
Full-Stack Engineer at VC-backed AI cybersecurity startup
Join a London-based AI security startup founded by a deep domain expert to revolutionize vulnerability management. As a Full-Stack Engineer, you'll build agentic AI systems that think like attackers to automate the hour-long investigations security teams don't have time for. With £120k-£130k salary, meaningful early equity, and a team of just four, this is a rare opportunity to shape an AI-native product from the ground up and solve real-world security gaps for global organizations.
Want to apply for this role?
C
Jack finds you jobs at companies like Confidential company. Talk to Jack to get considered for roles that fit what you're great at.
Location
London, United Kingdom
Compensation
£120k-£130k + Equity
Company
Confidential company
Role overview
About the company
VC-backed AI cybersecurity startup
What you will do
- Develop and maintain a Python-based backend and React frontend, ensuring seamless integration of AI-driven security features.
- Build and optimize evaluation pipelines and agentic AI models that simulate attacker reasoning to identify exploitable vulnerabilities.
- Collaborate directly with the founder to design, prototype, and ship customer-driven features that bridge the gap between security and development.
Who this is a fit for
- Has 4-6 years of professional experience with strong Python fundamentals and a proven track record of shipping production-ready code.
- Possesses deep applied-AI knowledge, including experience with model trade-offs, evaluation frameworks, and leveraging LLMs as a force multiplier.
- Thrives in fast-paced startup environments and enjoys solving complex, ambiguous problems across the entire technology stack.
Why this role is remarkable
- Join a high-caliber team of four as an early employee with direct founder access and significant product ownership.
- Work on cutting-edge agentic AI that solves complex cybersecurity problems at a scale humans cannot match manually.
- Backed by top-tier VCs and industry-leading advisors from global tech giants, operating in a massive $17B+ market.
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.