Application Security Engineer

Responsibilities

We are representing a confidential AI-powered SaaS client seeking an Application Security Engineer to join their London-based security engineering team. In this role, you will:

• Own and engineer tier-zero security capabilities that enable secure deployment and management of production services
• Design, build, and evolve customer-facing security features including authentication, SAML/SSO, permissions systems, audit and activity logging, malicious URL scanning, and enterprise security controls
• Partner with engineering teams throughout the software development lifecycle to build secure products and services
• Perform architecture reviews, threat modelling exercises, and security assessments for new features and systems
• Build security tooling, automation, and developer-facing building blocks that make secure development easier and more scalable
• Contribute to secure development standards, guidance, and best practices across the organization
• Lead application security initiatives, helping teams identify and address security risks early
• Participate in a shared on-call rotation and lead security incident response, investigation, and remediation efforts
• Drive security initiatives from problem definition through design, implementation, and measurable outcomes
• Partner with teams building AI-powered products to assess and mitigate emerging security risks
• Help shape an AI-first approach to security, including AI-powered detection, red-team automation, continuous monitoring, and emerging defensive capabilities
• Support the secure adoption of AI-assisted software development tools and engineering workflows

What We're Looking For

Required qualifications:

• Proven application security, product security, or security engineering experience within a SaaS environment
• Strong software engineering skills with experience designing, building, and operating production systems
• Deep understanding of modern application security threats, secure software development practices, and threat modelling
• Experience designing, building, or securing authentication, authorization, identity, or enterprise security capabilities
• Experience conducting architecture reviews and security assessments for complex systems
• Hands-on security incident response experience, including leading investigations and remediation efforts
• Strong programming skills and experience building tools, automation, or developer-focused solutions
• Comfortable using modern AI-assisted development tools to improve productivity and engineering effectiveness
• Ability to communicate security concepts clearly and collaborate effectively with engineering teams
• A pragmatic approach to balancing security, customer impact, and engineering velocity

Bonus qualifications:

• Experience building or owning authentication, SAML/SSO, identity, or access management capabilities
• Experience securing AI-powered products or familiarity with security considerations for large language models, agentic systems, retrieval-based architectures, or AI tool integrations
• Experience building security automation or security-focused platform capabilities at scale
• Familiarity with cloud security, infrastructure security, or distributed systems
• Experience working across both large-scale SaaS environments and high-growth companies

How We Work With You

As your representing recruitment partner, our talent team at Get A Job.ai will guide you through the entire process. Interested candidates apply directly through getajob.ai, where one of our experienced recruiters will conduct an initial screening to understand your background and career goals. We then submit qualified candidates to our client for consideration. Please note that direct contact with the client is not part of the process—all communication flows through our recruiting team to ensure a smooth and professional experience.

This is a hybrid position based in London, requiring at least three days per week in the office.

Pay

Compensation details will be discussed during the screening process and are competitive with market rates for this level of experience in London.

Equal Employment Opportunity

Get A Job.ai is committed to fostering an inclusive recruitment process. We evaluate all candidates based on qualifications, skills, and experience without regard to race, religion, color, national origin, sex, sexual orientation, gender identity, age, disability, veteran status, or other protected characteristics.