{"id":163486,"url":"https://alion.io/job/mistral-ai-cybersecurity-platform-security-engineer","title":"CyberSecurity, Platform Security Engineer","company":{"id":22,"name":"Mistral AI","domain":"mistral.ai","url":"https://alion.io/company/mistral-ai","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"A","score":95,"open_postings":200,"ghost_share":0,"stale_share":0.005,"repost_share":0,"time_to_fill_p50_days":65,"computed_at":"2026-10-22T06:10:10Z"}},"role":"Security","role_family":"Security","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Paris, France"],"countries":["FR"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":66000,"max_usd":106000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":47},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"CI/CD","optional":false},{"name":"Python","optional":false},{"name":"Threat Modeling","optional":false}],"status":"live","first_seen_at":"2026-07-02T12:14:47Z","employer_posted_date":"2026-07-02","last_verified_at":"2026-10-22T20:24:15Z","board_verified":true,"closed_at":null,"days_open":112,"trust":{"level":"ok","repost_count":0,"flags":[],"days_open":111},"description":"About Mistral\nMistral 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.\nWe 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.\nRole summary\nAs 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.\nYour 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.\nWhat you will do\nDrive threat modeling and risk prioritization exercises as the security counterpart in system-design reviews for core infrastructure and new products.\n\nOwn end-to-end vulnerability management across continuous integration and deployment pipelines and runtime environments, covering infrastructure and applications.\n\nSecure our container orchestration deployments and containerized workloads, implementing advanced hardening to prevent lateral movement across distributed systems.\n\nDefine and enforce Infrastructure-as-Code security by building robust guardrails and integrating policy-as-code directly into deployment pipelines.\n\nDesign and execute a comprehensive security tooling strategy, managing solutions for cloud-native application protection, cloud security posture, static code analysis, dependency scanning, secrets management, and vulnerability tracking.\n\nChampion developer enablement by building secure defaults, streamlining remediation workflows, and drafting actionable security guidelines.\n\nBuild foundational security automation to scale alongside hyper-growth, minimizing manual overhead while establishing a pragmatic security culture.\n\nWhat we're looking for:\nFive or more years of experience in Platform Security, Security Engineering, or Cloud Security, ideally as an early security hire in a fast-scaling environment.\n\nDeep understanding of container orchestration and container security, alongside strong experience securing Infrastructure-as-Code across major cloud providers.\n\nStrong programming and scripting skills in languages such as Python or Go to build security automation and integrate diverse security tools into developer workflows.\n\nExtensive experience deploying and tuning modern security tooling with a pragmatic approach to vulnerability management and threat modeling.\n\nStrong communication skills with a proven track record of partnering with developers and researchers to embed secure defaults without creating engineering friction.\n\nWhat We Offer\nWe offer a comprehensive benefits package designed to support your well-being, growth, and work-life balance. Benefits vary by country and may include healthcare coverage, parental leave, retirement plans, relocation support, wellness programs, meal and transportation allowances, and other location-specific perks.\nFor the most up-to-date details on benefits available in your location, please refer to our Benefits page.\nPrivacy Policy\nYour privacy matters to us. 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