Senior Application Security Engineer

LE130 Unity Technologies SF; Texas; Hybrid; USD 181,000 - 271,000; Full time

Benefits offered by this job

Comprehensive health insurance

Commute subsidy

Employee stock ownership

Generous vacation and personal days

Parental leave programs

Office snacks

Mental Health & Wellbeing programs

Global Employee Assistance Program

Job summary

Unity Technologies seeks a Senior Application Security Engineer to drive threat modeling, secure design reviews, and code evaluation across Unity products, editors, cloud services, and APIs. You will leverage AI-assisted tooling and collaborate with U.S. and EMEA teams to strengthen defenses.

You will secure AI/agentic systems, guide remediation with secure defaults and guardrails, and contribute to the SDLC and compliance efforts.

Qualifications

• Extensive experience in application security on large-scale systems.
• Strong secure coding knowledge and OWASP Top 10 awareness.
• Hands-on secure development across multiple languages.
• Practical pentesting, security assessment, and vulnerability management.

Responsibilities

• Lead threat modeling, secure design reviews, and pen tests for Unity products and services.
• Perform deep code review and manual testing on high-risk systems with AI-assisted reviews.
• Build and operate security automation.
• Use AI-assisted tooling for continuous code review and testing, stepping in where needed.
• Secure Unity's AI and agentic systems and assess AI-native products for risks.
• Partner with engineering to remediation and secure defaults.
• Investigate and respond to security incidents and root-cause analyses.
• Contribute to Unity's secure development lifecycle and compliance work.

Skills

Threat modeling

Secure design reviews

Code review

Penetration testing

AI-assisted security tooling

Cloud security

Security automation

Secure SDLC

Technical communication

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

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

• 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 needs of our customers, partners, and collaborators. If you have a disability that means there are preparations or accommodations we can make to help ensure you have a comfortable and positive interview experience, please fill out this form to let us know.

Language & Communication

This position requires the incumbent to have a sufficient knowledge of English to have professional verbal and written exchanges in this language since the performance of the duties related to this position requires frequent and regular communication with colleagues and partners located worldwide and whose common language is English.

Privacy & Data

Your privacy is important to us. Please take a moment to review our Prospect and Applicant Privacy Policies. Should you have any concerns about your privacy, please contact us at [e-mail].

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.

At Unity, we're committed to creating a workplace that fosters collaboration and teamwork that allows you to harness your unique skills. Join us in creating industry tools to help creators of all levels bring their projects to reality. Learn more about our culture and values, and get a head start by reading about how our hiring process works.