Security Engineer, Detection and Response (AI Security)

Location: London, UK; hybrid workplace

Company

WRITER is an AI platform for enterprise marketing and revenue teams, using autonomous agents, enterprise intelligence, governance, and compliance to support Fortune 500 customers.

What you will do

• Design and implement detections for prompt injection, model extraction, data poisoning, adversarial examples, and unauthorized access to training datasets or model weights.
• Build automated response playbooks, orchestration workflows, and self-healing systems that contain threats and remediate compromised inference endpoints.
• Coordinate security incident response across Cloud, AppSec, Enterprise, and AI Security teams; investigate training-pipeline attacks and model manipulation attempts.
• Proactively hunt threats across GPU clusters and training infrastructure, analyze model outputs, reproduce AI-specific vulnerabilities, and identify visibility gaps.
• Build detection-as-code frameworks, onboard telemetry from AI infrastructure and inference endpoints, and create dashboards for model security, GPU utilization, and sensitive research-data access.
• Maintain a 24/7 on-call rotation and collaborate with infrastructure, software security, and AI research teams on defense-in-depth security guardrails.

Requirements

• 3–5+ years in security operations, detection engineering, or incident response, including a proven record of stopping sophisticated production attacks, plus 3+ years securing AI/ML infrastructure, high-performance computing environments, or distributed systems at scale.
• Strong programming skills in Python, KQL, SPL, or similar languages for detection logic, response automation, and security tooling.
• Experience with SIEM platforms, detection technologies, and forensic investigation in complex distributed environments.
• Ability to build detections for novel attack techniques without established patterns.
• Self-directed execution with experience protecting high-value intellectual property, automating incident response, and identifying security gaps through proactive threat hunting.
• Ability to collaborate across security, infrastructure, and AI research teams and take accountability for protecting AI platforms.

Culture & Benefits

• Hands-on security engineering focused on evolving AI and AGI threats, with cross-functional collaboration across security, cloud infrastructure, software security, and AI research.
• 24/7 on-call rotation for critical AI security incidents.
• UK full-time benefits include generous PTO, company holidays, medical and dental insurance, 16 weeks of paid parental leave, and fertility and family planning support.
• Competitive pension scheme, company contribution, annual wellness and learning-and-development stipends.
• Company-wide and team off-sites, competitive compensation, and company stock options.