Overview
Tesco Mobile • Slough • Apply by 06-Feb-2026
The Tesco Mobile Engineering team is a cross functional team responsible for both functional software development as well as running and operation of tailored and product / SaaS based IT solutions. You will be working within a diverse team on business-critical infrastructure management. Our teams are motivated and challenged, working in sprints across a range of technologies which provide benefit to the wider business.
We are the Run and Operate Chapter which manages the platforms and infrastructure used by many of the business services needed in Tesco Mobile. This role is part of the DevSecOps squad and works with the Run and Operate Chapter Lead. The DevSecOps squad manages the infrastructure powering all Engineering systems and applications, and the software development tools and pipelines used across Tesco Mobile.
The Squad consists of:
* DevSecOps Engineers - AWS
* DevSecOps Engineers - Azure
* Kubernetes Engineers
* Platform Automation Engineers
* Product Owner
* QA Automation Engineers
Responsibilities
* As a DevSecOps Engineer you will help the team manage and deploy the environment in a secure and optimised manner.
* Manage logging and SIEM aspects of the infrastructure and coordinate with application development teams to resolve issues.
* Work with the squad to integrate security checks into the CI/CD pipeline.
* Validate planned changes to ensure compliance with best practice and collaborate with the Tesco Mobile Cyber Security Team.
* Define and refine infrastructure security standards and act as the domain authority for infrastructure security.
* Collaborate with application development teams to refine logging to derive valid insights.
* Solve complex cross-business technical problems as part of the team.
* Create business justifications for security improvements and present these to Product Owners and other stakeholders in clear terms for non-technical audiences.
* Share knowledge with other members of the squad.
What is in it for you
* Annual bonus scheme of up to 20% of base salary
* Holiday starting at 25 days plus a personal day (plus Bank holidays)
* Buy holiday salary sacrifice scheme
* Private medical insurance
* Retirement savings plan with Tesco matching contribution
* Life Assurance - 5 x contractual pay
* 26 weeks maternity and adoption leave (after 1 year) at full pay, followed by 13 weeks of statutory pay; 4 weeks fully paid paternity leave
* Right to request flexible working from day one
* Free 24/7 virtual GP service and Employee Assistance Programme (EAP)
* Colleague Clubcard for you and a family member (after 3 months)
* Discounts on everyday purchases and access to colleague networks
* Opportunities to access ongoing learning and training
You will be responsible for
* Be a great teammate and live the Tesco Mobile values.
* Work with the Chapter Lead to improve the security of the infrastructure and applications.
* Define and refine infrastructure security standards.
* Act as the domain authority for infrastructure security.
* Work with application development teams to refine logging to derive valid insights.
* Collaborate to solve complex cross-business technical problems.
* Present business justifications for security improvements to Product Owners and stakeholders in clear terms.
* Share knowledge with other members of the squad.
You will need
* Significant commercial experience with security operations management.
* Significant experience with cloud providers (mainly Azure).
* Experience automating tasks using PowerShell or Azure CLI.
* Experience using Azure Security Hub and other tools to improve cloud security posture.
* Experience maintaining and updating infrastructure using Terraform.
* Willingness to learn new skills.
Nice to have
* Experience with AWS environments
* Experience with source code systems and branching strategies (GitHub and GitHub Actions).
* Experience in a commercial setting using and managing Splunk including data streams, indices, ingests and dashboards.
* Experience of CI/CD pipelines and integrating security tooling.
* Experience using SAST and other techniques to improve code security.
* Automation experience with tools and languages including AWS CLI, Python, etc.
* Containerisation technologies such as Docker and Kubernetes.
* Exposure to CI/CD approaches and tools, including GitHub Actions.
About us
A 50-50 joint venture between Tesco and VMO2 established in 2003. Tesco Mobile, with more than 5 million customers, is the largest mobile virtual network operator in the UK. We are committed to an inclusive culture and accessible recruitment process.
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