Senior Application Security Engineer

Unity Technologies SF; United States; Hybrid; USD 160,000 - 241,000; Full time

Benefits offered by this job

Health insurance

Life insurance

Disability insurance

Commute subsidy

Employee stock ownership

Retirement plans

Generous vacation and personal days

Parental leave programs

Office snacks

Mental Health support

Employee Resource Groups

Global Employee Assistance Program

Training and development programs

Volunteer program

Job summary

Unity Technologies seeks a Senior Application Security Engineer to lead threat modeling, secure design reviews, and manual/AI-assisted testing across Unity products, editors, and cloud services. You will secure AI systems and collaborate with US/EMEA teams to drive remediation and secure defaults.

You will perform deep code reviews, automate security testing, and contribute to secure SDLC and compliance work, leveraging a range of languages and cloud platforms.

Qualifications

• Experience in application security with large-scale systems.
• Strong secure coding and OWASP Top 10 knowledge.
• Hands-on secure development across multiple languages.
• Penetration testing, security assessment, and vulnerability management experience.
• Experience with Cloud security (GCP, AWS, or Azure).
• Clear technical communication across regions.

Responsibilities

• Lead threat modeling, secure design reviews, and pen testing for Unity products and services, from engine/editor to cloud services and APIs.
• Perform deep code review and manual testing on high-risk systems, using AI-assisted review processes.
• Build and operate security automation, extend AI-assisted tooling for code review and penetration testing.
• Secure Unity's AI and agentic systems, assess AI-native products and LLM integrations.
• Partner with engineering teams to drive remediation and secure defaults.
• Investigate and respond to application security incidents with root-cause analysis.

Skills

Application security

Threat modeling

Secure design reviews

Penetration testing

Code review

AI-assisted tooling

Cloud security

Secure development lifecycle

Technical communication

Cross-regional collaboration

Tools

GCP

AWS

Azure

Job description

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 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.

What you bring: domain expertise

• Experience in application security, with a track record on complex, large-scale systems.
• Strong command of secure coding and common vulnerability classes (OWASP Top 10 and beyond)
• Hands-on secure development experience across several languages.
• Practical penetration testing, security assessment, and vulnerability management experience with standard tooling.
• Experience with Cloud security (GCP, AWS, or Azure).
• Working knowledge of secure architecture patterns.
• Clear technical communication for both engineers and non-technical partners across regions.

Preferred Qualifications

Experience in the technology, gaming or Ad tech industry

Base Salary Range

Base Salary Range: We determine the base salary range for this role based on your primary work location:

Zone A: USD $160,300 - USD $240,500 gross

Zone B: USD $181,200 - USD $271,800 gross

Zone C: USD $203,600 - USD $305,400 gross

This range reflects the anticipated base salary for this position. Beyond base salary, this role may be eligible for equity awards and participation in our company incentive plans (such as annual discretionary bonuses or sales commissions). The final offer amount will depend on several factors, including geographic location and the candidate's relevant experience, professional background, and skill set.

Benefits

At Unity, we want our team members to thrive. We offer a wide range of benefits designed to support well-being and work-life balance.

Please note: Benefits eligibility, specific offerings, and coverage vary based on the country and employment status.

• Comprehensive health, life, and disability insurance
• Commute subsidy
• Employee stock ownership
• Competitive retirement/pension plans
• Generous vacation and personal days
• Support for new parents through leave and family-care programs
• Office food snacks
• Mental Health and Wellbeing programs and support
• Employee Resource Groups
• Global Employee Assistance Program
• Training and development programs
• Volunteering and donation matching program

Life at Unity

Unity [NYSE: U] is the world's leading game engine, powering play for more than 3 billion consumers each month. The top mobile games in the world, the most played PC indie titles, the most innovative console games, and virtually all of the top XR and Web Games are developed, deployed, and grown in Unity. Unity also enables teams across industries like automotive, manufacturing, and healthcare to design, simulate, and collaborate in 3D - closing the gap between ideas and reality. For more information, please visit www.unity.com .

Unity is a proud equal opportunity employer. We are committed to fostering an inclusive, innovative environment and celebrate our employees across age, race, color, ancestry, national origin, religion, disability, sex, gender identity or expression, sexual orientation, or any other protected status in accordance with applicable law. Our differences are strengths that enable us to support the growing and evolving n