Senior Security Engineer — AI Platform & AppSec Lead

Wintermeyer Ventures; San Francisco (CA); On-site; USD 200,000 - 330,000; Full time

Benefits offered by this job

Equity

Job summary

Wintermeyer Ventures in San Francisco, CA seeks a senior individual contributor to own application security for a rapidly scaling, multi-tenant AI platform serving enterprise customers. You will embed secure practices across the entire software development lifecycle, protecting data at scale.

You will partner with product engineering to integrate security from design to deployment, build tooling, and drive vulnerability remediation. This is an on-site role with substantial equity and high impact.

Qualifications

• 4+ years in software engineering and hands-on application/infrastructure security.
• Experience with GCP or AWS cloud security.
• Familiar with security tooling across the stack (SAST/DAST/IAST, container security, Semgrep, CodeQL).
• Strong Python and cloud-native infrastructure (Kubernetes, CI/CD).
• Background as founding security engineer at VC-backed company is a plus.

Responsibilities

• Design and implement application security controls across a multi-tenant AI platform, including secure coding practices, threat modeling, and vulnerability management.
• Partner closely with product engineering teams to integrate security from design through deployment.
• Build security tooling and automation that helps developers ship quickly while identifying and remediating vulnerabilities fast.
• Lead security code reviews and architecture assessments for new features, with a focus on AI model integration points and customer data handling.
• Respond to security incidents involving application vulnerabilities and drive post-incident improvements.

Skills

Application security

Software engineering

Cloud security

SAST/DAST/IAST

Tools

Semgrep

CodeQL

Kubernetes

CI/CD

Job description

Wintermeyer Ventures in San Francisco, CA seeks a senior individual contributor to own application security for a rapidly scaling, multi-tenant AI platform serving enterprise customers. You will embed secure practices across the entire software development lifecycle, protecting data at scale.

You will partner with product engineering to integrate security from design to deployment, build tooling, and drive vulnerability remediation. This is an on-site role with substantial equity and high impact.