Security Engineer, AI & LLM Systems Lead

present of AI; Greater London; Hybrid; GBP 120,000 - 180,000; Full time

Job summary

Flow Engineering is seeking a senior security engineer to define and own the security agenda for AI-enabled products. You will lead threat modeling, secure design, cloud hardening, tenant isolation, data protection, and incident response across our AI platform and its services.

You will also secure LLM and agentic systems, guard against prompt injection and data leakage, and help determine guardrails and action limits.

Qualifications

• Experience in threat modeling, secure design, cloud and application hardening, tenant isolation, data protection, and incident response.
• Production engineering background and experience running secure cloud services at scale.
• Experience carrying a company through SOC 2 in a regulated setting.
• Familiarity with security reviews touching TypeScript/Python services.

Responsibilities

• Lead threat modeling and secure design across AI and cloud services.
• Ensure data protection, tenant isolation, and incident response readiness.
• Drive SOC 2 readiness and compliance in regulated environments.
• Secure LLM and agent workflows, guarding against prompt injection and data leakage.

Skills

Threat modeling

Cloud security

SOC 2

Securing LLM systems

Security reviews

TypeScript

Python

Tools

TypeScript

Python

Job description

Flow Engineering is seeking a senior security engineer to define and own the security agenda for AI-enabled products. You will lead threat modeling, secure design, cloud hardening, tenant isolation, data protection, and incident response across our AI platform and its services.

You will also secure LLM and agentic systems, guard against prompt injection and data leakage, and help determine guardrails and action limits.