Senior Application Security Engineer — AI/Cloud Defenses

ironSource; Town of Texas (WI); Hybrid; USD 181,000 - 272,000; Full time

Benefits offered by this job

Health insurance

Employee stock ownership

Retirement plans

Paid time off

Job summary

Unity is seeking a Senior Application Security Engineer to lead threat modeling, secure design reviews, and code evaluation across Unity products and services. You will apply AI-assisted tooling for secure development, review high-risk systems, and secure Unity's AI and agentic workflows.

Collaboration with US and EMEA engineering teams is essential, with a focus on remediation and secure defaults. The role requires hands-on AppSec expertise across languages, vulnerability management, and strong

Qualifications

• Experience in application security on complex, large-scale systems.
• Strong command of secure coding and OWASP Top 10+.
• Hands-on secure development across several languages.
• Experience with standard penetration testing tools and vulnerability management.
• Cloud security knowledge (GCP/AWS/Azure).
• Clear technical communication across regions.

Responsibilities

• Lead threat modeling, secure design reviews, and penetration testing for Unity products and services.
• Perform deep code review and manual testing on high-risk systems using AI-assisted review processes.
• Build and operate security automation and AI-assisted tooling for code review and testing.
• Secure Unity's AI and agentic systems, assess risks in AI-native products and LLM integrations.
• Collaborate with engineering to drive remediation and implement guardrails and secure defaults.
• Investigate and respond to application security incidents with root-cause analysis.
• Contribute to Unity's secure development lifecycle and compliance efforts.

Skills

AppSec experience

Secure coding

Vulnerability management

Cloud security

Secure architecture

Technical communication

Tools

Penetration testing tools

AI tooling

Job description

Unity is seeking a Senior Application Security Engineer to lead threat modeling, secure design reviews, and code evaluation across Unity products and services. You will apply AI-assisted tooling for secure development, review high-risk systems, and secure Unity's AI and agentic workflows.

Collaboration with US and EMEA engineering teams is essential, with a focus on remediation and secure defaults. The role requires hands-on AppSec expertise across languages, vulnerability management, and strong