Senior Security Engineer — Detection, Cloud & Automation

Fyul; España; On-site; EUR 45,000 - 67,000; Full time

Job summary

FYUL is seeking a senior security engineer to own significant parts of its security platform, including detection engineering, vulnerability discovery, cloud and endpoint security, and data loss prevention. You will drive automation of security operations and contribute to AI-enabled detection pipelines in production.

The role reports to the Information Security Engineering Manager and is an individual-contributor position focused on depth of expertise, ownership, and practical impact across

Qualifications

• 5+ years in security engineering or SecOps roles with hands-on responsibility for detections and incidents in production - not solely policy or advisory work.
• Real detection engineering experience on a modern SIEM/security platform (Elastic Security preferred; Splunk, Sentinel, or comparable count).
• Deep, hands-on mastery of Linux, macOS, and Windows: internals, hardening, and investigation on all three.
• Strong networking expertise: TCP/IP, routing, VPNs, firewalls, and packet-level analysis.
• Strong cloud security foundation in AWS, including Kubernetes; you have personally secured and monitored production cloud workloads.
• Hands-on LLM experience and building or operating AI-powered tooling in security workflows.

Responsibilities

• Detection engineering: design, implement, and tune detections across our security telemetry and ML-based detection.
• Triage alerts, investigate real incidents, and drive them to closure with incident response improvements.
• Harden and monitor AWS and Kubernetes environments and collaborate with engineering to enable security as a feature.
• Own health and hardening of the endpoint agent fleet across macOS, Windows, and Linux.
• Operate and extend DLP coverage across removable media, email, and SaaS channels.
• Automate recurring security operations and detection-to-response workflows with AI-powered tooling.
• Perform vulnerability discovery and drive remediation through scanning and targeted testing.

Skills

Detection engineering

Security engineering

SIEM

Cloud security

LLM experience

Automation

Incident response

Vulnerability management

Tools

AWS

Kubernetes

Terraform

Helm

Atlantis

Postman

Git

GitHub Copilot

Grafana

Kibana

Prometheus

Job description

FYUL is seeking a senior security engineer to own significant parts of its security platform, including detection engineering, vulnerability discovery, cloud and endpoint security, and data loss prevention. You will drive automation of security operations and contribute to AI-enabled detection pipelines in production.

The role reports to the Information Security Engineering Manager and is an individual-contributor position focused on depth of expertise, ownership, and practical impact across