# Sr. Staff AI Security Engineer at BILL

- Company: BILL
- What the company does: BILL (NYSE: BILL) provides financial automation software for small and midsize businesses (SMBs), streamlining payables, receivables, and expense management. Backed by Emergence Capital.
- Company website: https://bill.com
- Type: Startups (AI role)
- Level: Senior
- Location: Draper, Utah, United States; San Jose, California, United States
- Work setup: On-site
- Posted: 2026-09-23
- Apply by: 2026-11-07
- Apply: https://www.bill.com/job?6175334004&gh_jid=6175334004
- Page: https://www.1752.vc/careers/jobs/bill-sr-staff-ai-security-engineer/

## About the role

We are looking to hire a Sr. Staff AI Security Engineer to lead the secure deployment and operation of AI and ML systems across the company. This role moves beyond traditional perimeter security to address the unique vulnerabilities of Large Language Models (LLMs) and automated orchestration layers. Your mission: provide a secure foundation—gateways, orchestration layers, and tool ecosystems—that enables developers to innovate at pace while maintaining a robust security posture.

## What they're looking for

- A proven track record of building and scaling security systems in high-growth environments
- High proficiency in Python or Go to build, automate, and scale security tooling
- Deep understanding of LLM-specific attack vectors: prompt injection and jailbreaking
- Deep understanding and applied experience with the OWASP LLM Top 10 framework
- Experience designing secure API gateways, orchestration layers, and scalable security infrastructure using infrastructure as code
- Experience standing up red-teaming or adversarial testing programs

Tags: Engineering