IT Security Consultant - Secure Data and Document ProtectionBrussels, hybrid workingFluent in English and French C1Are you a cybersecurity-savvy professional passionate about secure communications and data integrity? Join our prestigious client as a Secure Data and Document Protection Expert, and be at the forefront of designing secure digital ecosystems for major international stakeholders.The RoleAs a Secure Data and Document Protection Expert, you will play a critical role in ensuring the confidentiality, integrity, and availability of sensitive data and messaging systems. Based in Brussels with hybrid flexibility, you will contribute to high-impact projects, often in the context of EU institutions.You will:Design and implement integration layers between backend systems and secure messaging tools.Advise on security principles including authentication, authorization, non-repudiation, and encryption.Lead risk assessments and security testing initiatives.Maintain technical documentation for messaging and transport protocols.Optimize secure data transfer architecture and backend system interfaces.Your ExperienceDeep knowledge of messaging & web protocols: ebMS3, AS4, XML, JSON, BDXL, TLS, OAuth2, OpenID, WS-Security.Strong backend development expertise: Java, OOP, design patterns, SQL, LDAP, ACID/XA transactions.Mobile development experience (3+ years): Android (Java/Kotlin), iOS (Swift), Key Attestation.Familiarity with CI/CD & DevOps: Jenkins, Git, SonarQube, Selenium, JMeter, Dynatrace, Splunk.Containerization & infrastructure experience: Docker, Kubernetes, Linux, load balancers, TPM, HSM.Agile mindset with proficiency in SCRUM, OpenPM2, and tools like JIRA, Confluence.Excellent communication skills with fluency in English and French (C1 minimum).Desirable:SANS Web Application Tester certificationPrevious experience working with or for EU institutionsKnowledge of advanced cryptographic hardwareCertifications in cybersecurity, software development, or project managementBackground in large-scale international or multicultural environments