Founding CTO (+ Equity) at VC-backed AI security startup

Job Title

Founding CTO

Salary

Not Disclosed + Equity

Company Description

VC-backed AI security startup

Job Description

Join a well-funded startup as Founding CTO to build advanced ML/AI systems for automated security research and threat detection. You will design agentic risk management platforms that reason about complex adversary behavior in real time. This is a ground-floor opportunity to own the technical roadmap and shape the engineering culture from day zero.

Location

London, UK

Why this role is remarkable

• True co-founder status with significant equity ownership and the ability to define the core technology and product strategy.
• Work alongside an experienced founder with deep enterprise deployment history, ensuring the product addresses real-world security challenges.
• Tackle high-impact problems by building agentic AI systems that move beyond pattern matching to sophisticated, context-aware reasoning.

What You Will Do

• Lead the design and implementation of the core ML/AI architecture, building high-performance systems capable of real-time threat modeling.
• Act as the primary technical contributor, writing production-grade code while setting long-term engineering standards and culture.
• Translate complex security research and adversary behaviors into scalable AI agents that help enterprise teams manage risk more effectively.

The ideal candidate

• Possesses deep ML/AI research credibility, typically demonstrated via a PhD or significant tenure at top-tier research labs.
• Demonstrates a strong desire to transition from research to building, with the technical breadth to own an early-stage startup stack.
• Has a background or strong interest in applying advanced machine learning to cybersecurity challenges like threat detection and risk modeling.

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