Senior Defensive Security Engineer

Senior Defensive Security Engineer – Barcelona (Hybrid) SQUAD - Cabinet de conseils et d’expertises · Barcelona Since 2011, SQUAD Group has been a key player in the cybersecurity landscape. We partner with leading organizations to protect their information systems through a comprehensive 360° offering of consulting, integration, expertise, and managed services. Our mission: Securing Together! We believe in a collaborative approach to cybersecurity, where experts and clients work hand-in-hand to anticipate threats and protect critical infrastructure. As part of our growing team, we’re looking for a Senior Defensive Security Engineer based in Barcelona. You’ll join the security operations team of a major international digital player, helping take its defensive capabilities to the next level. Your Role You are an engineer at heart with a strong operational background. Your focus is making security operations faster, smarter, and more reliable: automating what slows teams down, sharpening detection quality, and giving stakeholders clear visibility into how the defense is performing. Your Responsibilities - Build automations and integrations that speed up day-to-day operations and incident handling. - Own and optimize the defensive security stack so it stays reliable and scales with the business. - Improve alert quality by cutting noise and closing detection gaps. - Design dashboards and KPIs that show the health and effectiveness of security operations. - Partner with security and engineering teams to strengthen protection and response across the organization. - Support and coach less experienced team members. What You Bring - 5+ years in security operations, SOC engineering, or detection and response. - Hands-on experience running incidents from first alert through to lessons learned. - Strong expertise with SIEM/XDR solutions, including detection rule writing and tuning. - Experience turning threat intelligence into actionable detections, with good knowledge of MITRE ATT&CK. - Practical experience with DLP policies. - Solid coding skills in Python or Go, with experience working with APIs and SOAR automation. - Ability to explain technical risks clearly to both engineers and leadership. - Fluent English. Preferred Certifications: GIAC GCIH / GCIA / GCDA, BTL2, or vendor certifications on major SIEM/XDR platforms. Why Join Squad? - Personalized Growth: We help you build a training and certification plan aligned with your professional goals through our SquadeXpérience. - Expertise Development: Participate in internal events like our MixYourTalent webinars and monthly CTF sessions. - Visibility: Attend major industry conferences and contribute to our #TheExpert technical blog. - Culture: Enjoy a dynamic and close-knit environment with after-work events and team gatherings that foster great camaraderie.