AI-First Application Security Engineer

Fin. The highest performing Customer Agent; Dublin; Hybrid; EUR 90,000 - 120,000; Full time

Benefits offered by this job

Equity

Lunch & snacks

Hybrid work policy

Cycle-to-Work

MacBooks provided

Job summary

Fin is transforming customer service through AI, building secure, scalable products. Join our Security Engineering team to own tier-zero security capabilities, design authentication and authorization features, and partner with engineering to ship secure AI-powered products.

You'll lead security reviews, threat modelling, incident response, and develop tools to automate security across the software development lifecycle.

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.

Responsibilities

• Own and engineer tier-zero security capabilities that help customers securely deploy and manage Fin.
• Design, build, and evolve customer-facing security features, including authentication, SAML/SSO, permissions systems, audit and activity logging, malicious URL scanning, and other 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 Fin.
• Lead application security initiatives across the software development lifecycle, 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 Fin's 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.

Skills

App security

Software engineering

Threat modelling

Auth & identity

Security reviews

Incident response

Automation tooling

AI tools

Communication skills

Security-velocity balance

Tools

SAML/SSO

CI/CD security

Threat modelling tools

Job description

Fin is transforming customer service through AI, building secure, scalable products. Join our Security Engineering team to own tier-zero security capabilities, design authentication and authorization features, and partner with engineering to ship secure AI-powered products.

You'll lead security reviews, threat modelling, incident response, and develop tools to automate security across the software development lifecycle.