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Senior Application Security Engineer

Paris💼 Full-time🗓 2026-09-25

Core

Establish and validate security models, requirements, and controls for emerging application architectures including agentic applications, LLM-enabled products, and untrusted execution environments.

Role type

Senior IC application security engineer (emerging architectures & AI)

Builds

Secure-by-default approaches for new application paradigms, agent identity, data access, and tool permissions

Domain

Cloud security, AI/LLM security, distributed systems

Deliverable

production ML models | product features

Required skills

software engineering (Go, Rust, or Python), security controls design, threat modeling, authentication/authorization, API security, zero-trust networking, runtime hardening, LLM security concepts

Preferred skills

LLM frameworks (MCP, A2A), agent-based architectures, distributed systems experience

Technologies

Go, Rust, Python, MCP, A2A

Responsibilities

Define security models and guardrails for emerging architectures; Design and validate practical security controls for high-risk behaviors; Shape authentication, authorization, and workload isolation strategies; Partner with product and platform teams to embed secure-by-default requirements; Lead threat modeling and security assessments for new products; Drive remediation of emerging security risks and continuous security testing

Seniority

Senior, hands-on IC

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