Tesco is seeking a Senior Security Engineer specialising in Detection Engineering to design, develop and improve security detections across its technology environment. The role typically involves creating detection logic, analysing security telemetry, reducing false positives, supporting threat hunting and incident response, and improving monitoring through automation and engineering practices. Candidates are expected to have strong experience in cybersecurity, SIEM platforms, detection frameworks, scripting or programming, cloud and enterprise environments, and knowledge of threats, vulnerabilities and attack techniques. The successful applicant should communicate clearly, work collaboratively with security and technology teams, investigate complex problems, and help develop reliable, scalable security capabilities. Relevant certifications and experience with tools such as Microsoft Sentinel, Splunk or similar platforms may be advantageous.
Tesco is one of the United Kingdom’s largest retailers, serving millions of customers through supermarkets, convenience stores and online shopping services. Founded in 1919, the company has grown into a broad international retail and technology organisation, with operations spanning grocery, banking, telecommunications and digital services. Tesco employs a large workforce across stores, distribution centres, offices and technology teams. Its technology organisation supports e-commerce, data, payments, supply chain systems, customer platforms and enterprise security. The company places strong emphasis on customer service, responsible business, inclusion and operational efficiency. Security engineering is particularly important because Tesco manages extensive customer, colleague, payment and commercial data. Employees commonly work in collaborative, agile environments, with opportunities to contribute to large-scale systems used throughout the UK and, in some areas, internationally.
The United Kingdom offers opportunities in cybersecurity, software engineering, retail technology, finance, healthcare and logistics, with major employment centres in London, Manchester, Edinburgh, Birmingham, Bristol and Leeds. Its culture is diverse and generally values punctuality, personal privacy, direct but polite communication and work-life balance. Lifestyle choices range from busy cities and historic towns to coastal areas and countryside, although housing and transport can be expensive in London and the southeast. British weather is changeable, and public transport is strongest in larger cities. British and Irish citizens can work without a visa. Most other nationals need permission, commonly through the Skilled Worker route, and sponsorship depends on the employer, occupation, salary and current immigration rules. Relocating usually requires arranging a visa, accommodation, National Insurance registration, banking and healthcare access. Tesco’s sponsorship policy should be confirmed directly for this position.
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