As a Security Engineer within Tesco’s Detection Engineering team, you will design and implement advanced security monitoring capabilities that proactively protect a global retail ecosystem serving millions of customers. This role is central to evolving Tesco’s cyber defence posture by deploying scalable, detection and prevention solutions. You will bridge foundational engineering, emerging architecture, embedding automation, innovation, and resilience into the organisation’s security fabric. Operating with a strong engineering mindset, you will help ensure threats are identified and mitigated before they impact customers or operations. Key Responsibilities
• Design & Implement Detection Capabilities: Engineer and deploy robust security controls and detection logic to proactively identify and mitigate cyber threats across Tesco’s technology landscape. • Embed Modern Engineering Practices: Apply secure, test-driven development principles to build resilient, maintainable, and scalable security solutions. • Drive Automation & AI Adoption: Leverage automation and Applied Artificial Intelligence (AI) to enhance detection accuracy, reduce false positives, and optimise response workflows. • Strengthen Security Infrastructure: Contribute to the hardening of cloud and enterprise environments through innovative detection and prevention mechanisms. • Collaborate Across Cyber & Technology Teams: Work closely with Security Operations Centre (SOC), Threat Intelligence, and platform engineering teams to deliver integrated, customer-first security outcomes. • Champion Continuous Improvement: Actively learn from incidents, research emerging threats, and translate insights into improved detection coverage and engineering practices, fostering an inclusive and innovative team culture.
· Engineering & Development Expertise: Demonstrable understanding of software development lifecycles, with hands-on exposure to programming and building production-grade solutions.
· Secure & Test-Driven Engineering: Experience applying secure coding practices and test-driven development approaches within an engineering or security context.
· Core Cyber Defence Technology: Practical exposure to security platforms (e.g., Security Information and Event Management (SIEM), Endpoint Detection and Response (EDR)) and their role in detection engineering.
· Detection Engineering Fundamentals: Understanding of how custom detection rules, alerts, and telemetry are designed, tested, and implemented to identify malicious activity at scale. Able to reduce noise without impacting visibility, and to sustain detection quality over time,
· Continuous Learning & Curiosity: Evidence of strong curiosity and commitment to professional development, staying current with evolving threats and technologies.
· Collaboration & Inclusion: Ability to work effectively within diverse, cross-functional teams, contributing to an inclusive and supportive engineering environment.
· Pragmatic Problem Solving: Solid critical thinking capability, with the ability to break down complex problems and deliver practical, scalable solutions.
· Experience using tools such as Github, Jira, Zendesk, and xMatters for engineering workflow and operational collaboration.
You might know us as a supermarket, technology company or even for our award-winning mobile network. Truth is, we’re all of those things, and much more. Our colleagues work with one goal in mind, helping to make every day a little better for our customers, colleagues and communities all over the world. No two customers are the same, neither are our colleagues. At Tesco, we champion a balance that lets you thrive both in and out of work. Spend 60% of your week collaborating with colleagues at our office locations or local sites and the rest remotely. Whether you're just kicking off your career, juggling passions, or navigating big life events, we're here to support you. We always welcome a conversation about flexible working, so talk to us throughout your application about how we can support. We're proud to be an accredited Disability Confident Leader, where everyone’s welcome. That’s why we commit to providing a fully inclusive and accessible recruitment process. If you need support with your application, click here for more information. And if you're interested in joining our team but don't tick every box, don't let that hold you back from applying. When you join us in this role, you'll be employed by Tesco Stores Limited, the Tesco legal entity responsible for your employment.
