Senior Application Security Engineer

Employment type: FULLTIME. Requisition: 3123731. Senior Application Security Engineer About the role Unity builds the real-time 3D platform that powers games and interactive experiences, along with tools used across ads, automotive, aerospace, architecture, retail, energy, and government. Our Product Security team keeps that platform, and the software built on top of it, safe for millions of creators and their users.

We are seeking a Senior Application Security Engineer with profound expertise in application security. In this role, you will execute fundamental AppSec tasks, including threat modeling, secure design reviews, code evaluation, and vulnerability management, leveraging both manual methods and advanced AI tooling.

You will also help secure the AI systems Unity itself is building, including agentic tools and AI-assisted development workflows. You will work directly with engineering teams across the US and EMEA.

What you will do

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 automation1 …