The Trade Desk

Sr Application Security Engineer

Bellevue; Ventura · Senior · Full-time

Sponsorship not specified$114k-$208kDetected 14 hours ago

JavaScriptPythonJavaGoC#Code ReviewGitAWSGCPAzureDockerKubernetesHelmCI/CDGitHub ActionsJenkinsMachine LearningLLMsCybersecurityAccessibilityLeadershipCommunicationArgo CD

About the role

Our technology helps advertisers reach the right audiences across the open internet - from streaming TV and podcasts to mobile apps, news, and more.
Advertising powers the content people love.
When you work here, your impact is worldwide.

Responsibilities

Extend and own scalable AppSec tooling across four core areas: SAST/DAST pipeline integration, vulnerability management, threat modeling frameworks, and security posture- building on existing foundations and closing meaningful gaps.
Validate findings end-to-end: triage and reproduce scanner output to separate signal from noise, then contextualize risk so engineering teams understand exactly what to fix, why it matters, and what the customer impact would be if exploited.
Assess and help secure AI/ML systems - including inference APIs, LLM integrations, and GenAI attack surfaces such as prompt injection and model exfiltration - and build AI-augmented tooling to scale the team's output.
Drive security culture through direct engineering partnership: advising on secure-by-design patterns early in the development process, raising the security floor across hundreds of engineers, and keeping customer trust at the center of every recommendation.
Participate in and drive security governance-first frameworks to include developing and publishing standards, guidelines, procedures, secure baselines, and policies.
6-8+ years in application security with a track record of building tooling and automation, not just operating it.
By making it more transparent, effective, and responsible, we help support trusted journalism, quality entertainment, and creators worldwide.
The scale of our platform brings unique technical challenges - from processing massive datasets in real time to building systems that operate reliably on a global scale.
Experience in AI/ML security - securing AI pipelines, assessing LLM integrations, understanding GenAI attack surfaces, or building AI-assisted security tooling.

Requirements

BS degree or equivalent years of experience in related field
Active software development experience - you write clean, production-ready code in at least one of: C#, Java, Python, Go, or JavaScript.
Hands-on experience with SAST, DAST, SCA, and secrets management tooling, including configuration, tuning, and CI/CD integration (GitHub Actions, GitLab, Jenkins, ArgoCD, or similar).
Practical threat modeling experience (STRIDE, PASTA, or equivalent) - producing engineering-useful outputs, not just risk documentation.
Experience with vulnerability management workflows: aggregation, triage, risk-based prioritization, and driving remediation at scale.
Working knowledge of Kubernetes and container security (Docker, Helm, Istio) and cloud security fundamentals across at least one major platform (AWS, GCP, or Azure).

Nice to have

Certifications such as OSWE, GWAPT, CSSLP, OSCP, or cloud security certifications (AWS, GCP, or Azure) are a plus.
Experience in ad tech, large-scale SaaS, or other high-throughput consumer or enterprise platforms is a plus. #LI-TP1

Compensation

The base salary range for this role is
$113,500 - $208,100 USD

Benefits

Interns are not eligible for variable incentive awards such as stock-based compensation, retirement plan, vacation, tuition reimbursement or parental leave
At the Trade Desk, Base Salary is one part of our competitive total compensation and benefits package and is determined using a salary range.

Company info

We are looking for a Senior Application Security Engineer to join our Cybersecurity Department.
This person will complement and extend the application security capabilities we have built - with significant opportunity to make an immediate, sizable impact.
You will own tooling, lead threat modeling, and harden the application security program across a platform used daily by the world's largest brands.
This is not a steady-state role: there is meaningful work to do, and the right person will see it and run toward it.
The right candidate brings deep application security expertise, strong software development instincts, and a genuine bias to action.
You are someone who builds things - not just findings documents.
You think about security from the perspective of the engineers you partner with and the customers whose trust is at stake, and you communicate in ways that make both groups more effective.
Beyond the technical experience, we are looking for someone with the qualities that make a security engineer effective in a collaborative, fast-moving engineering culture.
You are curious about how systems work and how they break.
You pair that curiosity with ownership and follow-through.
You communicate clearly, give and receive feedback well, and approach the engineers you work with as partners - not gatekeepers.
Security is a team sport, and you bring that mindset every day.
The Trade Desk is a global technology company and the world's leading independent platform for digital advertising, with nearly 4,000 employees across more than 30 offices.

Equal opportunity

As an Equal Opportunity Employer, The Trade Desk is committed to creating an inclusive hiring experience where everyone has the opportunity to thrive.
Please reach out to us at accommodations@thetradedesk.com to request an accommodation or discuss any accessibility needs you may require to access our Company Website or navigate any part of the hiring process.
When you contact us, please include your preferred contact details and specify the nature of your accommodation request or questions.

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