* Assigned Recruiter(s) Suchitra Garikapati * Date Opened 09/17/2026 * Country Spain * Job Posting ID ZR_4444_JOB What is the mission about? Job Description At NextLink, we are looking for a Senior Security Engineer (SIEM) to join our team and collaborate closely with one of our most recognized clients in the pharmaceutical sector. You will join the Cyber Intelligence & Security Operations Center (CISOC) team, focusing on security monitoring and detection capabilities through SIEM/XDR technologies. The role combines hands‑on security engineering, use case development, automation, detection improvement, reporting, and collaboration with Security Detection, Incident Response, Risk, and Information Security teams. Main Responsibilities: * Design, implement, and continuously improve SIEM/XDR security use cases, including fine-tuning to reduce false positives. * Develop and maintain scripts, integrations, and APIs to enrich SIEM/XDR capabilities and automate security monitoring activities.



* Support the implementation and maintenance of simulated threats / BAS scenarios to test and improve detection use cases. * Contribute to the evolution of security technologies in line with the defined roadmap and improve detection capabilities together with Security Detection and Incident Response teams. * Act as a point of contact for security monitoring reports and dashboards, presenting status and updates to technical experts and management. * Follow defined frameworks, processes, SOPs, and working instructions, ensuring compliant and up-to-date documentation. * Collaborate with Risk and Information Security teams on identified risks, remediation, prioritisation, analysis, triage, and security monitoring improvements. Requirements * Proven hands‑on experience with SIEM/XDR technologies and security monitoring/detection activities. * Experience developing and fine‑tuning security detection use cases, ideally with technologies such as Microsoft Sentinel or Microsoft Defender. * Prog

📌 Senior Security Engineer (Barcelona)
🏢 Nextlink Group
📍 Barcelona