Senior AppSec Engineer: AI-Enhanced Security & Cloud

LE130 Unity Technologies SF; København; On-site; DKK 702,000 - 1,053,000; Full time

Benefits offered by this job

Health, life & disability insurance

Commuter subsidy

Employee stock ownership

Retirement plan

Vacation & personal days

Parental leave

Office snacks

Mental health programs

Employee Resource Groups

Global Employee Assistance Program

Training & development programs

Volunteer program

Job summary

Unity Technologies is seeking a Senior Application Security Engineer to lead threat modeling, secure design reviews, and code evaluation across engine, editor, and cloud services. You will apply AI-assisted review processes and work with engineering teams across US and EMEA.

You bring 5+ years in application security, hands-on secure development across multiple languages, experience with SAST/DAST/SCA, cloud security, and strong communication.

Qualifications

• 5+ years in application security with large-scale systems.
• Strong knowledge of secure coding and OWASP Top 10.
• Hands-on secure development across several languages.
• Experience with SAST, DAST, SCA and manual testing.
• Cloud security experience (GCP/AWS/Azure).
• Clear technical communication across regions.

Responsibilities

• Lead threat modeling, secure design reviews, and penetration testing for Unity products and services, from the engine and editor to cloud services, APIs, and internal platforms.
• Perform deep code review and manual testing on high-risk systems, using AI-assisted review processes and covering areas automated tooling cannot fully reach.
• Build and operate security automation. Use and extend AI-assisted tooling for continuous code review, finding triage, and automated penetration testing, and step in where human judgment is required.
• Secure Unity's AI and agentic systems. Assess AI-native products, LLM integrations, and agent workflows for the risks specific to them.
• Partner with engineering teams to drive remediation, turning recurring findings into guardrails, secure defaults, and paved paths.
• Investigate and respond to application security incidents, including root cause analysis and durable corrective action.
• Contribute to Unity's secure development lifecycle and to compliance work.

Skills

Application security

Secure coding

Secure development

Penetration testing

Cloud security

Authentication

Cryptography

Secure architecture

Communication

Tools

SAST

DAST

SCA

Manual testing

Job description

Unity Technologies is seeking a Senior Application Security Engineer to lead threat modeling, secure design reviews, and code evaluation across engine, editor, and cloud services. You will apply AI-assisted review processes and work with engineering teams across US and EMEA.

You bring 5+ years in application security, hands-on secure development across multiple languages, experience with SAST/DAST/SCA, cloud security, and strong communication.