Security Engineer, Application Security (UK)

TL;DR

Security Engineer, Application Security (UK): Building security foundations for enterprise AI platform with an accent on threat modeling LLM architectures, automated security controls, and developer enablement. Focus on securing AI agents, protecting data pipelines, and designing defenses against novel AI/ML threats.

Hybrid from London, UK office

Company

hirify.global is a $1.9B valued leader in enterprise generative AI, powering AI agents for brands like Mars, Marriott, Uber, and Vanguard with offices in San Francisco, New York, Austin, Chicago, and London.

What you will do

• Conduct threat modeling sessions, design secure architectures for new features, and embed security into product decisions from day one
• Own application security program: establish SAST/DAST in CI/CD, perform code reviews, and automate vulnerability detection
• Champion secure coding standards, create reusable security patterns and libraries for developers
• Design security features for customer environments and leverage AI agents to boost security velocity
• Lead penetration testing and security assessments of applications, AI services, APIs, and data pipelines
• Research emerging AI/ML threats and build proactive defenses

Requirements

• 4+ years in application security engineering securing large-scale systems (bonus: startups/high-growth)
• Understanding of developer workflows, balancing risk and velocity
• Expertise in at least two languages (Python, Java, Go, JavaScript/TypeScript) for code review
• Knowledge of SAST/DAST, vulnerability management, DevSecOps practices
• Excellent communication to explain security to technical/non-technical audiences
• Builder's mindset: automate, scale, enable business

Culture & Benefits

• Generous PTO, company holidays, paid parental leave (16 weeks), fertility support
• Comprehensive medical/dental insurance, pension scheme with company contribution
• Wellness, learning stipends; early-detection cancer testing
• Company-wide and team off-sites
• Competitive compensation and stock options