Senior AppSec Engineer - AI & Cloud Security

Upside is seeking an experienced security engineer to own the application security program across mobile, web, and cloud systems. You will triage findings, lead threat modeling, and guide remediation with engineering teams to reduce real risk. You will build automation, guardrails, and secure-by-default patterns in AWS, GitHub Actions, and CI/CD workflows, while collaborating with product and security teams to ship safe software at scale.