Founding Engineer at $4.2M pre-seed AI-native cyberdefense startup

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Job Title

Founding Engineer

Salary

Not Disclosed

Company Description

$4.2M pre-seed AI-native cyberdefense startup building automated digital forensics for the AGI era

Job Description

Join as one of the first dedicated engineers at a high-growth London startup automating cybersecurity incident response. You will architect agentic AI systems that handle complex digital forensics, scale a multi-tenant cloud platform on GCP, and build critical evaluations to measure AI performance against real-world cyber threats in production.

Location

London, UK

Why this role is remarkable

• Significant founding equity stake in a $4.2M pre-seed company solving one of the most critical security challenges of the AI era.
• Directly influence the architectural DNA of a production platform already serving customers and handling real-world cyber attacks.
• Work alongside world-class founders and an expert team of incident responders to build automated forensics tools that will become ubiquitous.

• Design and deploy sophisticated agentic AI systems capable of executing multi-step cybersecurity investigations and reasoning chains.
• Architect and scale a cloud-native SaaS platform using FastAPI, React, PostgreSQL, and DuckDB to support real-time enterprise collaboration.
• Build and maintain robust evaluation frameworks to benchmark how AI systems perform against live, documented cyber incidents.

• Proven track record of shipping and operating production software with strong Python skills in async patterns and task pipelines.
• Hands-on experience deploying LLMs at scale using frameworks like LangChain and RAG, moving beyond experimentation to production implementations.
• Experienced with cloud-native infrastructure including GCP/AWS, Terraform, and Docker, with a mindset for reliability, observability, and SOC2-compliant operations.

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/founding-engineer-at-4-2m-pre-seed-ai-native-cyberdefense-startup-4e7d1d3c-a777-4f38-9d34-fb1eb9654c41?utm_source=linkedin&utm_medium=job_post&utm_campaign=featured_role_4e7d1d3c-a777-4f38-9d34-fb1eb9654c41

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.