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Senior Security Engineer - Detection Engineering - Tesco
Security Engineer
Lead detection engineering initiatives, designing security‑first infrastructure and automated defenses for a global retail platform using cloud, SIEM, and Python‑based automation.
About the role
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.