CyberSecurity, Platform Security Engineer

ABOUT MISTRAL Mistral provides full-stack AI solutions: from frontier models to developer tools, applications, and compute. We partner with enterprises tackling the hardest problems across high-stakes industries like finance, manufacturing, defense, healthcare, and the public sector, co-creating customized AI systems that they can run on their terms. 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 Europe, North America, Asia and the Middle East. We are creative, low-ego and team-spirited. Role summary   As a Platform Security Engineer on the Security team, you will architect and maintain the security posture of our rapidly scaling AI infrastructure and application lifecycle. Security is not a gate but an enabler, and you will embed robust controls into our continuous integration and deployment pipelines, infrastructure environments, and developer workflows to protect our systems without sacrificing velocity. Your role exists to ensure that our research and engineering teams can move fast while staying secure. You will shape how security integrates with every layer of our stack, from code to cloud, making secure practices invisible to developers and automatic by default.     What you will do   - Drive threat modeling and risk prioritization exercises as the security counterpart in system-design reviews for core infrastructure and new products. - Own end-to-end vulnerability management across continuous integration and deployment pipelines and runtime environments, covering infrastructure and applications. - Secure our container orchestration deployments and containerized workloads, implementing advanced hardening to prevent lateral movement across distributed systems. - Define and enforce Infrastructure-as-Code security by building robust guardrails and integrating polic