Senior AppSec Engineer — AI & Secure Coding Lead

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

Benefits offered by this job

Health insurance

Life insurance

Disability insurance

Commute subsidy

Stock ownership

Retirement plan

Vacation days

Parental leave

Mental health support

Employee resource groups

Privacy protection program

Job summary

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.

You will work directly with engineering teams across the US and EMEA to lead threat modeling, perform deep code reviews, and drive remediation with secure defaults and guardrails.

Qualifications

• 5+ years of 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.

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

5+ years in AppSec

Secure coding

Code review

Penetration testing

Cloud security

Cryptography basics

Technical communication

Tools

SAST

DAST

SCA

Job description

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.

You will work directly with engineering teams across the US and EMEA to lead threat modeling, perform deep code reviews, and drive remediation with secure defaults and guardrails.