Staff Security Engineer - Detect & Response - EU/UK Remote, UK

This role is pivotal in enhancing Marqeta’s ability to detect and respond to threats. You will contribute to the design, documentation, and implementation of a security detection engineering program, participate in on-call rotations and incident response efforts, and collaborate with various teams to assess detection gaps across Marqeta. This role offers the opportunity to directly impact the program through strong technical contributions. The role reports to the Manager of Security Operations and Response. You'll perform detection engineering and regularly write/maintain detection logic to identify suspicious activity. You'll also document and track detection capabilities across numerous data sources and participate in a 24x7x365 on-call rotation for alert response. You will also be an active responder as part of the Cybersecurity Incident Response Team during declared incidents. You'll contribute to automation and orchestration playbooks to streamline detection engineering, threat hunting and incident response activities. Participate in threat hunts to proactively identify threats and regularly review current use cases/detection logic to identify and remove gaps in coverage.