Lead ML Architect at high-growth cybersecurity AI startup

Lead ML Architect

High growth cybersecurity AI startup.

Job Description

You will architect a sophisticated Context Engine that resolves the volume crisis in cybersecurity, bridging rigid infrastructure data with semantic LLM reasoning. You will transform thousands of raw alerts into actionable focus areas using entity resolution, multi membership clustering, and deterministic logic guardrails.

Location

London, UK

Why this role is remarkable

• Lead the development of a core engine that moves beyond simple LLM wrappers into complex data modeling and explainable AI.
• Join a well funded startup backed by top tier VCs at an early stage where you define the technical authority and roadmap.
• Solve high stakes engineering challenges involving sparse data points, canonical identity resolution, and massive scale vulnerability correlation.

What you will do

• Design a feature engineering layer that translates hard infrastructure signals like IPs and CNAMEs into inductive biases for LLM reasoning.
• Implement a taxonomy driven knowledge injection pipeline using deterministic lookup systems to ensure high accuracy domain expertise.
• Create a logic layer for entity resolution to resolve canonical identities across sparse data points and define asset boundaries.

The ideal candidate

• Proven experience building complex data pipelines where LLMs are integrated as components rather than standalone solutions.
• Strong background in ML engineering, specifically categorical data normalization, feature engineering, and agentic workflow orchestration.
• Solid understanding of security literacy, including vulnerability patterns, infrastructure networking concepts, and deterministic deduplication methods.

Next steps

1. Visit our website.
2. Click 'Talk to Jack'.
3. Talk to Jack so he can understand your experience and ambitions.
4. Jack will make sure Jill (the AI agent working for the company) considers you for this role.
5. If Jill thinks you're a great fit and her client wants to meet you, they will make the introduction.
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.

Who are Jack & Jill?

Okay, 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.