Sr. Security Engineer

Sr. Security Engineer

Position Overview:

We are seeking a Sr. Security Engineer to join our Agentic Experience group, reporting to the Principal Engineer, Agentic Development. In this role, you will strengthen the security posture of our core payments platform while helping shape security practices for AI-assisted software development. You will work closely with our Agentic Experience group and our CISO, with visibility to executive leadership. This is a hands-on engineering role with broad scope: application security, cloud infrastructure security, and security review of AI/agentic development tooling.

Responsibilities & Goals:

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

Experience & 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

Relevant certifications (e.g., CISSP, OSCP, AWS Security Specialty) are a plus but not required

Nice to Have

Security certifications (e.g., AWS Security Specialty, CISSP, OSCP, GIAC).

Experience securing payments, ecommerce, or subscription/billing platforms.

Experience with secure SDLC practices and integrating security tooling (SAST/DAST/SCA) into CI/CD.

Familiarity with global, multi-currency, or tax-calculation systems and their data-sensitivity considerations.

Consistent with FastSpring's values and applicable law, we provide the following information to promote pay transparency and equity. The base pay range below represents a good faith estimate of the low and high end base pay range for the listed position. This role may be eligible for the corporate bonus plan (or, if a sales role, a commission plan as defined in the sales incentive plan document). In addition, FastSpring provides a variety of benefits to employees.

Estimated Base Pay Range

$155,000—$187,000 USD