Senior Defensive Security Engineer — Hybrid (Barcelona)

SQUAD - Cabinet de conseils et d’expertises; Barcelona; Hybrid; EUR 70,000 - 100,000; Full time

Job summary

SQUAD Group in Barcelona seeks a Senior Defensive Security Engineer to join the security operations team. Hybrid work model in a major international digital player, focusing on making defense faster, smarter, and more reliable through automation and improved detection.

You will own and optimize the defensive stack, reduce alert noise, and design dashboards to showcase health and effectiveness of security operations. Strong coding skills and ability to communicate risks to leadership are required.

Qualifications

• 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.

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.

Skills

SOC engineering

Security operations

Detection and response

Python/Go

SIEM/XDR

MITRE ATT&CK

DLP policies

APIs & SOAR

Communication to leadership

Tools

SIEM/XDR platforms

SOAR automation

Job description

SQUAD Group in Barcelona seeks a Senior Defensive Security Engineer to join the security operations team. Hybrid work model in a major international digital player, focusing on making defense faster, smarter, and more reliable through automation and improved detection.

You will own and optimize the defensive stack, reduce alert noise, and design dashboards to showcase health and effectiveness of security operations. Strong coding skills and ability to communicate risks to leadership are required.