Security Architect
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Location:
Brussels, Belgium Work Model: 100% On-site – 5 days per week Start Date: 7 December 2026 End Date: 31 December 2027 Assignment: Long-term, Full-time Languages: Fluent English is mandatory; Dutch is an advantage Role Overview We are looking for an experienced Security Architect to support a major international organization in Brussels. The role focuses on Enterprise Security Architecture, Application & API Security, Secure Integration, Cryptography, Network Security and Infrastructure Security, ensuring secure and scalable enterprise solutions.
Key Responsibilities
• Design and review Security Architecture Diagrams, HLD/LLD and Data Flow Diagrams.
• Assess security requirements for Java-based enterprise applications and integration platforms.
• Define security controls for REST APIs, OAuth2, OpenID Connect (OIDC) and secure authentication.
• Review secure integrations using HTTPS, SFTP and Messaging Queues.
• Support PKI, SSL/TLS Certificates, Digital Signing and Encryption.
• Assess Firewalls/WAF, including Palo Alto, Check Point and F5 BIG-IP.
• Review Windows/Linux Security and conduct security testing, vulnerability assessments, and risk reviews.
• Collaborate with development, infrastructure and project teams to ensure secure solution delivery. Mandatory Requirements – Must Have
• Java knowledge and enterprise application security.
• Security Architecture Design, HLD/LLD and Data Flow Diagrams.
• HTTPS, SFTP, Messaging Queues and secure integration.
• PKI, Certificates, Digital Signing and Encryption.
• API Security, REST, OAuth2 and OpenID Connect (OIDC).
• Security Testing and Vulnerability Assessments.
• Firewalls/WAF – Palo Alto, Check Point and F5 BIG-IP.
• Windows and Linux Security.
• Project Management and Technical Coordination.
• Fluent English and 100% on-site availability in Brussels. Preferred Requirements – Should Have
• Cloud Security, IAM, Zero Trust and Secure-by-Design.
• Enterprise Security Architecture and Security Governance.
• Experience in complex multinational IT environments.
• Strong technical documentation and stakeholder management skills.
• Dutch language proficiency is an advantage. 📩 Interested? If you have strong experience in Security Architecture, Java, API Security, OAuth2/OIDC, Secure Integration, PKI, Encryption, Firewalls/WAF, and Windows/Linux Security, we would be pleased to hear from you. Please share your updated CV, earliest availability, and confirmation of on-site availability Email: hr@onetechsolutions.be
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