At a Glance
- Tasks: Hunt for vulnerabilities and enhance security in cutting-edge AI products.
- Company: Join Mistral AI, a pioneering company transforming the future of AI.
- Benefits: Competitive salary, equity options, health insurance, and generous parental leave.
- Other info: Work in a collaborative environment with excellent career growth opportunities.
- Why this job: Shape the future of secure AI while collaborating with a dynamic, creative team.
- Qualifications: 7+ years in offensive security and deep knowledge of AI/ML security risks.
The predicted salary is between 80000 - 100000 £ per year.
About Mistral
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.
Role summary
At Mistral AI, we’re pushing the boundaries of what’s possible with agentic systems—building products like Mistral Studio and Mistral Vibe that redefine how users interact with AI. As a Security Researcher, you’ll play a pivotal role in safeguarding these innovations by anticipating, identifying, and mitigating risks before they materialize. This isn’t just about finding vulnerabilities; it’s about shaping the future of secure AI by embedding an attacker’s mindset into everything we build. You’ll work at the intersection of offensive security, AI safety, and product development, collaborating with cross-functional teams to harden our systems against evolving threats. Your expertise will directly influence how we design, deploy, and protect our most critical assets — ensuring our agents remain resilient, trustworthy, and ahead of adversaries. This role is ideal for those who thrive in dynamic environments, where creativity, technical depth, and a passion for security converge to solve unprecedented challenges.
What you will do
- 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.
About you
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.
Location & Remote
This role is based in one of our European offices (Paris, France and London, UK). We will only consider candidates who either reside or are open to relocating there. We strongly believe in the value of in-person collaboration and we encourage going to the office as much as we can (at least 3 days per week) to create bonds and smooth communication. Our remote policy aims to provide flexibility, improve work-life balance and increase productivity.
What we offer
- Competitive salary and equity (stock-options)
- Health insurance
- Transportation allowance
- Sport allowance
- Meal vouchers
- Private pension plan
- Generous parental leave policy
- Visa sponsorship
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CyberSecurity Engineer, Offensive Security in London employer: Mistral AI
At Mistral AI, we pride ourselves on being an exceptional employer that fosters a dynamic and collaborative work culture, where creativity and innovation thrive. Our commitment to employee growth is evident through our comprehensive benefits package, including competitive salaries, health insurance, and generous parental leave, all designed to support a healthy work-life balance. Located in vibrant European cities like Paris and London, we encourage in-person collaboration to strengthen team bonds while also offering flexibility through our remote policy, making Mistral AI a truly rewarding place to advance your career in cybersecurity.
StudySmarter Expert Advice🤫
We think this is how you could land CyberSecurity Engineer, Offensive Security in London
✨Tip Number 1
Network like a pro! Reach out to folks in the industry, attend meetups, and connect with Mistral AI employees on LinkedIn. Building relationships can open doors that job applications alone can't.
✨Tip Number 2
Show off your skills! Create a portfolio or GitHub repository showcasing your projects, especially those related to offensive security and AI. This gives potential employers a taste of what you can do.
✨Tip Number 3
Prepare for interviews by practising common cybersecurity scenarios and challenges. Be ready to discuss your thought process and how you tackle vulnerabilities—Mistral loves a proactive mindset!
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen. Plus, it shows you're genuinely interested in being part of the Mistral team and its innovative culture.
We think you need these skills to ace CyberSecurity Engineer, Offensive Security in London
Some tips for your application 🫡
Tailor Your CV:Make sure your CV reflects the skills and experiences that align with the CyberSecurity Engineer role. Highlight your offensive security experience and any relevant projects you've worked on, especially those involving AI/ML security risks.
Craft a Compelling Cover Letter:Use your cover letter to tell us why you're passionate about AI and security. Share specific examples of how you've tackled vulnerabilities in complex systems and how you can contribute to our mission at Mistral AI.
Showcase Your Technical Skills:Don’t shy away from detailing your technical expertise! Mention your hands-on experience with cloud-native architectures, penetration testing, and any tools you've built or automated. We love seeing a builder’s mindset!
Apply Through Our Website:We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you’re considered for the role. Plus, it shows your enthusiasm for joining our team!
How to prepare for a job interview at Mistral AI
✨Know Your Stuff
Make sure you brush up on your offensive security knowledge, especially around AI/ML security risks. Be ready to discuss specific vulnerabilities you've encountered and how you tackled them. This will show that you’re not just familiar with the theory but have practical experience.
✨Show Off Your Creativity
Mistral AI values creativity, so think about how you can demonstrate this during your interview. Prepare examples of innovative solutions you've implemented in past roles, particularly in red and purple team exercises. This will highlight your ability to think outside the box.
✨Communicate Clearly
You’ll need to convey complex ideas to both technical and non-technical stakeholders. Practice explaining your past projects and findings in a way that’s easy to understand. This will showcase your communication skills and your ability to drive change within a team.
✨Emphasise Collaboration
Since the role involves working closely with cross-functional teams, be prepared to discuss how you’ve successfully collaborated in the past. Share examples of how you’ve partnered with defensive teams or other departments to enhance security measures, showing that you’re a team player.
