Casca
Senior Security Engineer
$180K–$240K
San Francisco · On-site · Senior · Full-time · Posted Sep 16, 2026
- Experience
- Several years of AppSec experience; no specific number stated.
About the job
Build and operate security engineering controls for Casca’s multi-tenant AI banking platform, including application security, AI threat defenses, incident response, and bank security reviews.
What you'll do
- Build and deploy security software, tooling, policy-as-code, automation, and CI/CD checks.
- Review designs and threat-model authentication, tenant isolation, borrower data handling, and AI-agent attack surfaces.
- Lead incidents end to end and turn bank security reviews and audits into engineering improvements.
What they ask for
- Several years of AppSec experience, with specific examples of security work.
- Write production code; the team primarily uses TypeScript/Node.js and Python.
- Understand security boundaries in multi-tenant systems, especially authorization.
- Communicate security risks to engineers and bank security teams and help get fixes shipped.
Nice to have
- Production experience securing LLM or agentic products.
- Experience establishing a security function or working with regulated financial institutions.
Pay
USD $180K – $240K base salary
Tools
TypeScript/Node.js, Python
AI focus
Secure the AI attack surface, including prompt injection, tool-use abuse, agent data exfiltration, and evaluations of security controls.
Model-written summary · the original posting is authoritative