SecurityEngineer

We are seeking a motivated, hands-on Security Engineer to join our security team. In this role, you will help protect, monitor, and continuously improve the security of our global systems — including cloud (AWS and M365) and on-premises infrastructure. You’ll play a central part in risk mitigation, incident response, automation of security operations, and embedding security best practices across our organization. What you'll do As a Security Engineer at Optiver, you'll be responsible for monitoring, protecting, and continuously improving the security of our global systems and infrastructure. At Optiver, this means proactive threat prevention, swift identification of security risks, and rapid response to incidents to ensure our systems remain secure under all circumstances. An engineering mindset, attention to detail, and a preference for pragmatic solutions are essential to keeping our systems operating. In practice, this means you will work on a range of activities in collaboration with the global security team on activities such as: Security Operations & Monitoring Monitor daily security operations, identify threats, investigate alerts, and respond to incidents across cloud and on-prem environments. Maintain and tune security tools across AWS, Microsoft 365, endpoints, and network infrastructure. Cloud & Identity Security Strengthen Microsoft 365 and Entra ID security through Conditional Access, MFA, PIM, Defender for Endpoint/Identity/O365, and tenant configuration hardening. Implement and support data protection capabilities, including Microsoft Purview, sensitivity labels, DLP, and insider risk policies. Automation & Engineering Build and maintain security automation using Python and PowerShell, with a strong focus on reducing manual processes and improving detection and response. Integrate systems using APIs (Graph API, REST, etc) to enhance security workflows. Work with AI and our AI engineering teams to ensure the security of the environment Risk Assessment