CyberSecurity, Offensive Security Engineer

 

At Mistral AI, we believe in the power of AI to simplify tasks, save time, and enhance learning and creativity. Our technology is designed to integrate seamlessly into daily working life.

 

We democratize AI through high-performance, optimized, open-source and cutting-edge models, products and solutions. Our comprehensive AI platform is designed to meet enterprise needs, whether on-premises or in cloud environments. Our offerings include le Chat, the AI assistant for life and work.

 

We are a dynamic, collaborative team passionate about AI and its potential to transform society.

Our diverse workforce thrives in competitive environments and is committed to driving innovation. Our teams are distributed between France, USA, UK, Germany and Singapore. We are creative, low-ego and team-spirited.

 

Join us to be part of a pioneering company shaping the future of AI. Together, we can make a meaningful impact. See more about our culture on https://mistral.ai/careers.

 

 

 

• 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.

 

 

You’re likely a strong fit if you bring:

• 7+ years of offensive security experience, with a track record of identifying and exploiting subtle vulnerabilities in complex systems—or equivalent expertise demonstrated through exceptional achievements.

• Deep knowledge of AI/ML security risks, including prompt injection, data leakage, model manipulation, and abuses of dynamic UI components.

• Hands-on experience assessing modern technology stacks, such as:

  • Custom 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, high-stakes 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.

Now, it would be ideal if you had experience with:

• Background in AI, data science, or related fields, with an understanding of how security intersects with model behavior and system design.

• Experience in high-growth startups or research-driven organizations, where agility and innovation are paramount.

• Expertise in adjacent disciplines, such as software engineering, detection engineering, SRE, or security architecture.