AI Security Engineer

At Hexa, we are looking for an AI Security Engineer. This dynamic role offers the chance to work closely with diverse teams. What you will do - Embed security by design across AI use cases, agents, and platform integrations, with strong controls for access, secrets, logging, monitoring, sandboxing, tool and API restrictions, and external integrations. - Translate group security policies and architecture into practical controls, reusable patterns, and guidance for AI teams, ensuring alignment with risk, third-party, supplier, and operational requirements. - Prepare security-gate evidence, drive remediation from reviews, and escalate unresolved control gaps, deviations, or delivery risks. - Address AI-specific risks such as prompt injection, data leakage, insecure tool use, excessive permissions, and weak auditability through hardening and secure deployment patterns. What we are looking for - At least 5 years in IT and cyber security, with at least some of that in transformation, digital or platform contexts. - Solid technical grounding in cloud security, identity and access management, application security and secure SDLC. - Working knowledge of AI/ML and Agentic AI security: prompt injection, data leakage, agent identity, tool-use risk, model supply chain. - Familiarity with OWASP LLM Top 10, MITRE ATLAS and NIST AI RMF. - Experienced with threat modeling, risk assessment and security architecture for distributed systems. - Professional working proficiency in English. What we offer - Continuous learning and development opportunities, including support for training and certification throughout your journey. - Private health insurance from day one, with optional family extension subject to internal policy. - Confidential mental health support through Hexa’s well-being initiatives. - Flexibility whenever the role and context allow it, supporting sustainable balance across different life stages. - Family support measures, including childcare-related support subject to internal policy. - Community moments, shared milestones and a culture of trust, contribution and inclusion. - Exposure to different IT contexts, teams and business areas, helping you grow your understanding of the technology market. Equal opportunity At Hexa, applications are considered based on skills, experience, potential and alignment with the role. We are committed to fair and inclusive recruitment practices, without discrimination, in line with the principles of the Portuguese Diversity Charter.