GenAI Application Security Engineer

LiftOff LLC; United States; On-site; USD 120,000 - 180,000; Full time

Job summary

Liftoff is seeking a Senior Security Engineer to own application security for GenAI and emerging businesses. This role focuses on secure software development, threat modeling, and automation across the stack—cloud, infrastructure, and applications.

You will collaborate with engineering teams, design sandboxed GenAI environments, and contribute to incident response. Reporting to the Director of Security, you will help shape a security-conscious engineering culture and build tools that scale

Qualifications

• 5+ years of relevant experience in security engineering or software engineering.
• Excellent judgment in prioritizing security efforts using a risk-based approach.
• Experience partnering with cross-functional teams to deliver security improvements and help engineers choose practical fixes.
• Write production-quality code for security tools and automation, review pull requests, and navigate large, unfamiliar codebases.

Responsibilities

• Establish secure software development standards and integrate security into engineering design and development.
• Create self-service paths for engineering teams to build and deploy securely through documented review workflows, reusable tools, and secure design patterns.
• Perform design and code reviews, threat modeling, and security assessments for GenAI, Creative GenAI, and emerging businesses, including sandbox design and isolation.
• Partner with stakeholders across the organization to build a culture of security-minded builders.
• Triage incoming security issues, prioritize vulnerabilities by risk, and work with engineering teams through timely remediation and verification.
• Assess vendors and AI tools to ensure their security controls and product features support secure employee use.
• Share the security team's on-call and incident-response rotation, including occasional off-hours response.
• Conduct blameless post-incident reviews, document findings, and follow through on remediation.
• Build maintainable security tools and automation, including an AI-assisted code-security triage pilot that produces actionable findings at a false-positive rate engineering will accept.
• Partner with Detection & Response to turn application-security findings and threat models into detection improvements and response guidance.
• Contribute across application, cloud, and infrastructure security as priorities change, including Accelerate and MX.

Skills

Security engineering

Software engineering

Threat modeling

Code review

CI/CD

Go

Python

JavaScript

Tools

Go

Python

JavaScript

Job description

Liftoff is seeking a Senior Security Engineer to own application security for GenAI and emerging businesses. This role focuses on secure software development, threat modeling, and automation across the stack—cloud, infrastructure, and applications.

You will collaborate with engineering teams, design sandboxed GenAI environments, and contribute to incident response. Reporting to the Director of Security, you will help shape a security-conscious engineering culture and build tools that scale