Senior Security Engineer - Detection Engineering - Tesco

Key Responsibilities

• Architect and implement security‑first infrastructure across cloud and on‑prem environments, ensuring scalability and resilience.
• Design, develop, and maintain automated detection and response capabilities using SIEM, threat intelligence feeds, and custom Python tooling.
• Translate complex threat and risk signals into testable security controls and playbooks that protect critical business services.
• Mentor and guide a team of engineers, fostering best practices in secure coding, incident response, and continuous improvement.
• Collaborate with product, platform, and operations teams to embed security controls early in the development lifecycle.

Requirements

• 5+ years of hands‑on experience in security engineering, detection engineering, or related cyber‑defence roles.
• Strong proficiency in Python for automation, scripting, and building detection logic.
• Deep knowledge of cloud security (AWS, Azure, or GCP) and Infrastructure‑as‑Code concepts.
• Extensive experience with SIEM platforms, threat hunting, and building automated response playbooks.
• Proven ability to lead technical design, mentor engineers, and drive security innovation in large‑scale environments.