Senior Security Engineer — AI & Cloud Security Lead

FastSpring, LLC; United States; Remote; USD 140,000 - 210,000; Full time

Job summary

FastSpring, LLC is seeking a Sr. Security Engineer to strengthen the security posture of its core payments platform and security practices for AI-assisted development.

You will collaborate with the Agentic Experience group and the CISO, shaping security across cloud infrastructure, applications, and development tooling. The role emphasizes hands-on engineering, vulnerability remediation, and risk assessment in a regulated payments context.

Qualifications

• 7+ years of hands-on security engineering experience (application security, cloud security, or infrastructure security).
• Strong experience with AWS security services and primitives (IAM, VPC networking, secrets management).
• Experience working in and securing large production codebases; JVM ecosystem experience preferred.
• Familiarity with modern AI-assisted development tools and an interest in their security implications.
• Strong prioritization and communication skills; ability to advocate for security investments with stakeholders.
• Experience in payments, fintech, or other regulated environments is a plus

Responsibilities

• Identify, prioritize, and remediate vulnerabilities across our Java-based platform and AWS infrastructure.
• Drive infrastructure security improvements, including IAM policy refinement, instance metadata protections, and network egress controls.
• Conduct security reviews of AI-assisted development pipelines, tool integrations, and agent-accessible services.
• Develop and maintain secure development standards, patterns, and guardrails for engineering teams.
• Partner with the fractional CISO on risk assessment, remediation planning, and compliance initiatives (including PCI DSS).
• Contribute to incident response readiness and security monitoring improvements.
• Communicate security priorities and progress clearly to technical and executive stakeholders

Skills

Security engineering

AWS security

JVM ecosystem

AI-assisted security

Communication

Stakeholder advocacy

Payments security

Tools

AWS IAM

VPC networking

Secrets management

PCI DSS

SAST/DAST/SCA

CI/CD security tooling

Job description

FastSpring, LLC is seeking a Sr. Security Engineer to strengthen the security posture of its core payments platform and security practices for AI-assisted development.

You will collaborate with the Agentic Experience group and the CISO, shaping security across cloud infrastructure, applications, and development tooling. The role emphasizes hands-on engineering, vulnerability remediation, and risk assessment in a regulated payments context.