Could Security Engineer

About the role Shape the Future of Cloud Security at Tesco Mobile Tesco Mobile is the UK’s largest virtual mobile network — powered by O2 and backed by the strength of Tesco. We’re known for doing things differently: award‑winning customer satisfaction, a collaborative culture, and innovative digital experiences for over five million customers. As a Cloud Security Engineer within the Run & Operate Chapter , you’ll join our DevSecOps Squad , working alongside DevOps engineers, platform specialists, and the Cyber Security Team. Your mission: to secure and optimise our cloud platforms across Azure and AWS , embedding robust security practices into everything we build and operate. This is a hands‑on role where you’ll define cloud security standards, drive improvements, validate infrastructure changes, and strengthen our detection and response capabilities. Your work will directly influence how we protect our services, customers, and engineering systems. You will be responsible for You will play a key role in securing and maturing Tesco Mobile’s cloud environments (Azure and AWS): Define, maintain, and evolve cloud infrastructure security standards across AWS and Azure Act as a subject‑matter expert on cloud and infrastructure security Lead and deliver cloud security improvement initiatives and posture management work Operational Cloud Security Use services like Azure Security Center/Security Hub and AWS Security Hub to monitor and enhance posture Identify threats, risks, and misconfigurations — and implement effective mitigation strategies Validate infrastructure changes to ensure they meet security and compliance requirements Collaboration & Strategy Work closely with the Cyber Security Team to align on strategy, controls, and company‑wide initiatives Communicate risk and security improvements in a clear, business‑focused way Support containerised environments and cloud‑native workloads where relevant You will need Proven experience in cloud security operations with either Azure or AWS (ideally both) Hands‑on experience with cloud security monitoring and posture management tools e.g., Azure Security Center, Azure Defender, AWS Security Hub Strong understanding of cloud governance, threat identification, and risk mitigation Experience integrating security controls into CI/CD pipelines Infrastructure as Code expertise (Terraform preferred) Logging/SIEM experience (e.g., Splunk, Sentinel, CloudWatch Logs) Automation skills using PowerShell, Azure CLI, AWS CLI, and/or Python Understanding of SAST, secure coding, and DevSecOps practices Collaborative mindset and eagerness to learn Nice to have GitHub & GitHub Actions Experience with both AWS and Azure Exposure to Docker, Kubernetes, or cloud container security Experience creating dashboards, log ingestion or data streams in Splunk #LI-AF2 #LI-Hybrid What’s in it for you We’re all about the little helps. That’s why we make sure our Tesco colleague benefits package takes care of you – both in and out of work. Click Here to find out more Annual bonus scheme of up to 20% of base salary Holiday starting at 25 days plus a personal day (plus Bank holidays) Private medical insurance 26 weeks maternity and adoption leave (after 1 years’ service) at full pay, followed by 13 weeks of Statutory Maternity Pay or Statutory Adoption Pay, we also offer 6 weeks fully paid paternity leave Free 24/7 virtual GP service, Employee Assistance Programme (EAP) for you and your family, free access to a range of experts to support your mental wellbeing About us Tesco has become a market leader by doing the little things that really matter for our customers and colleagues. It’s part of what makes Tesco such a great place to work, and we’re proud to have been accredited as one of Britain’s Top Employers again this year. We're the UK's number one retailer and we pride ourselves on offering a great shopping experience. We are passionate about our food, merchandise and services and will always try to get things right for our customers. But did you know we also offer great job opportunities? With stores, distribution centres and offices across the UK, and a vast variety of roles, we are always looking for people who have a hunger to work with customers and colleagues across our exciting business. We believe in treating each other with respect and giving everyone an equal opportunity to get on. It's our people that make the difference every day - helping us make a difference for our customers Should you be successful in your application, your offer will be subject to and conditional upon you providing your bank account details before your agreed start date. For more information about us please visit #VP25 #J-18808-Ljbffr