# Senior Application Security Engineer at Datadog

- Company: Datadog
- Status: Open
- Workplace: On-site
- Location: Paris, France
- Level: Senior
- Discipline: Security
- Employment: Full-time
- Posted: 2026-09-25
- Skills: LLM
- Apply: https://careers.datadoghq.com/detail/8230663/?gh_jid=8230663

## Description

As a Senior Security Engineer within Application Security at Datadog, you will help secure emerging application architectures where established security patterns may not yet exist, including agentic applications, LLM-enabled products, protocol-driven tool use, and untrusted execution environments. You will establish and validate security models, requirements, and controls while partnering with product and platform teams to develop secure-by-default approaches. Your work will address evolving trust boundaries, agent identity, data access, tool permissions, and runtime behavior through threat modeling, security solutions, and practical implementation. You will have the opportunity to shape how Datadog safely supports new application paradigms and address emerging security risks before they become systemic.
 At Datadog, we place value in our office culture - the relationships and collaboration it builds and the creativity it brings to the table. We operate as a hybrid workplace to ensure our Datadogs can create a work-life harmony that best fits them. 
 What You’ll Do: 
• Define security models, requirements, and guardrails for emerging application architectures where established patterns are incomplete or do not yet exist.
• Design, implement, and validate practical security controls that reduce risk in emerging architectures and high-risk system behaviors.
• Shape how emerging systems authenticate, authorize actions, isolate workloads, and access data, applying least-privilege principles throughout.
• Partner with product, platform, Infrastructure Security, and other enginee

More Datadog roles: https://deviantjobs.com/companies/datadog