Senior Cloud Security Engineer

Location: London (Hybrid – 2 days per week in the office)

Global, technology-led organisation providing solutions to some of the world's leading financial institutions.

They are looking for an experienced Senior Security Engineer (Cloud & SecOps) to join their Information Security team and take ownership of threat detection, incident response and cloud security across a complex AWS-hosted SaaS environment.

This is a hands-on role with significant ownership, combining security engineering, operational security and the opportunity to shape detection and response capabilities.

Key Responsibilities

• Own and strengthen the security posture of the AWS environment, including IAM, logging, security controls and cloud risk remediation.
• Manage and optimise the SIEM platform, developing detection use cases, tuning alerts and improving threat visibility.
• Oversee the managed Security Operations Centre (SOC), ensuring effective monitoring, escalation and incident handling.
• Lead security incident response activities, including investigation, containment, root cause analysis and remediation.
• Drive vulnerability management, penetration testing and external attack surface monitoring.
• Strengthen security across corporate systems, endpoints and SaaS applications.
• Develop security automation using scripting and infrastructure-as-code.
• Work closely with Engineering, Platform and IT teams to improve security controls and operational resilience.
• Provide security metrics and support audit and assurance activities.

Skills & Experience

• Strong background in security operations, cloud security engineering or a similar hands-on security role.
• In-depth experience securing AWS environments, including IAM, CloudTrail, GuardDuty, Security Hub and AWS Organizations.
• Practical SIEM experience, including developing and tuning detection rules, not just responding to alerts.
• Experience with container and Kubernetes security, ideally Amazon EKS.
• Proven experience leading security incident investigations and response within cloud environments.
• Experience managing or working closely with an outsourced SOC or MDR provider.
• Scripting experience with Python or similar languages, alongside infrastructure-as-code.
• Strong communication skills, with the ability to explain technical security risks to different stakeholders.

If you have strong AWS security experience, enjoy building effective detection and response capabilities, and want a role with genuine technical ownership, we'd be happy to hear from you.

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