Senior Security Engineer - Vulnerability & Data/SaaS Security

The Senior Security Engineer owns the day-to-day operation, integration, and continuous improvement of Marqeta's vulnerability management, cloud security posture, and data/SaaS security programs. This role sits at the center of the security tooling ecosystem, Tenable, Snyk, StackHawk, CrowdStrike, Sentra, Reco, and ArmorCode, correlating findings across platforms, driving remediation, and translating technical risk into metrics and reporting that inform both engineering teams and executive leadership.

We work Flexible First. This role can be performed remotely anywhere within Ontario or British Columbia, Canada. We’d love for you to join us!

This position is not for an existing vacancy.

The Impact You’ll Have

Vulnerability Management

• Own the end-to-end vulnerability management lifecycle — triage, prioritization, remediation tracking, and SLA enforcement — across infrastructure, applications, and containers using findings from Tenable.

• Review and act on application and code-level vulnerability findings from Snyk (SCA, SAST, container/IaC scanning) and dynamic applicat