AI Security Offensive Engineer

Mistral.ai; Paris; Hybrid; EUR 120,000 - 155,000; Full time

Benefits offered by this job

Healthcare coverage

Retirement plans

Relocation support

Wellness programs

Meal & transportation allowances

Job summary

Mistral AI in France is seeking an Offensive Security Pentester to safeguard our AI products, from agentic apps to cloud infrastructure. You’ll hunt for vulnerabilities, run red and purple team exercises, and translate findings into concrete improvements across engineering and product teams.

You should have 7+ years in offensive security, deep AI/ML security knowledge, and hands-on experience with Kubernetes, cloud platforms, CI/CD, and Python/React-based stacks.

Qualifications

• 7+ years of offensive security experience, with a track record of identifying and exploiting subtle vulnerabilities in complex systems.
• Deep knowledge of AI/ML security risks, including prompt injection, data leakage, model manipulation, and abuses of dynamic UI components.
• Hands-on experience with Kubernetes deployments and containerized environments.
• Cloud-native architectures (AWS, GCP, or Azure).
• CI/CD pipelines and GitHub security best practices.
• macOS/Linux internals and Python/React-based applications.
• Data science toolchains and AI/ML infrastructure.
• A builder’s mindset: the ability to write robust tools, automate offensive workflows, and contribute to defensive solutions in complex codebases.
• Strong intuition for trust boundaries and risk assessment in fast-moving environments.
• Outstanding communication skills, with the ability to distill technical nuances into compelling narratives that drive change.
• A collaborative spirit, eager to work alongside engineers, researchers, and product teams to embed security into every phase of development.

Responsibilities

• Proactively hunt for vulnerabilities in the interactions between our agentic applications, cloud infrastructure, and foundational models, with a focus on realistic, high-impact attack vectors.
• Design and execute red and purple team exercises, simulating sophisticated adversarial scenarios to stress-test our defenses and refine our detection capabilities.
• Partner with defensive teams to translate offensive insights into actionable improvements, from detection engineering to incident response.
• Conduct in-depth penetration testing across our product suite, including AI-driven workflows, custom infrastructure, and user-facing interfaces.
• Build and automate offensive tooling to scale your impact, leveraging cutting-edge techniques to stay ahead of emerging threats.
• Communicate findings with clarity and conviction, ensuring technical and non-technical stakeholders understand risks and prioritize mitigations effectively.
• Shape Mistral AI’s security strategy by contributing attacker-informed perspectives to threat modeling, risk assessment, and architectural decisions.

Skills

7+ years offensive security

AI/ML security

Kubernetes deployments

Cloud-native

CI/CD security

Python/React stack

Data science tools

Builder mindset

Clear communication

Tools

GitHub security

Job description

Mistral AI in France is seeking an Offensive Security Pentester to safeguard our AI products, from agentic apps to cloud infrastructure. You’ll hunt for vulnerabilities, run red and purple team exercises, and translate findings into concrete improvements across engineering and product teams.

You should have 7+ years in offensive security, deep AI/ML security knowledge, and hands-on experience with Kubernetes, cloud platforms, CI/CD, and Python/React-based stacks.