Cloud Security Engineer AWS - Tesco Mobile

Tesco UK; Slough; Hybrid; GBP 60,000 - 80,000; Full time

Job summary

A leading retailer in the United Kingdom is seeking a Cloud Security Engineer to enhance their cloud security postures within AWS and Azure environments. The candidate will lead security improvements, validate infrastructure changes, and integrate security into CI/CD pipelines. Ideal applicants will have strong hands-on experience with AWS cloud security and a proven track record of security improvement projects. The company values inclusivity and provides a blended working pattern, combining office and remote work.

Qualifications

• Strong hands-on experience with AWS cloud security.
• Experience within infrastructure validation, threat identification, and risk mitigation.
• Familiarity with CI/CD pipelines and integrating security tooling.

Responsibilities

• Lead and implement cloud security improvements across AWS and Azure environments.
• Use tools like AWS Security Hub and Azure Security Center to monitor and enhance security posture.
• Integrate security controls into CI/CD pipelines and development workflows.

Skills

AWS cloud security

SaaS security improvement

CI/CD pipelines

Infrastructure validation

Threat identification

Risk mitigation

Tools

AWS Security Hub

Azure Security Center

GitHub Actions

Splunk

Docker

Kubernetes

AWS CLI

Python

PowerShell

Job description

As a Cloud Security Engineer within the Run and Operate chapter at Tesco Mobile, you’ll play a key role in securing and optimising our cloud platforms—primarily AWS and Azure. You’ll help design, manage, and deploy secure solutions across a variety of environments, maintaining a proactive programme of work to address evolving security priorities. Your responsibilities will include identifying threats and risks, implementing effective mitigations, and validating infrastructure changes. You’ll also collaborate closely with the Cyber Security Team and your squad to embed robust security checks into CI/CD pipelines, strengthening our overall cloud security posture.

As a Cloud Security Engineer, you’ll play a key role in securing our cloud infrastructure and services. You’ll work within our DevSecOps squad to:

Responsibilities

• Lead and implement cloud security improvements across AWS and Azure environments.
• Use tools like AWS Security Hub and Azure Security Center to monitor and enhance our security posture.
• Integrate security controls into CI/CD pipelines and development workflows.
• Collaborate with the Cyber Security Team and application developers to embed security processes.
• Validate infrastructure changes to ensure compliance with security standards.
• Act as an expert on cloud and infrastructure security.

Must‑have experience

• Strong hands‑on experience with AWS cloud security.
• Proven track record of delivering cloud and SaaS security improvement projects.
• Familiarity with CI/CD pipelines and integrating security tooling (e.g., SAST).
• Experience within infrastructure validation, threat identification, and risk mitigation.

Nice to have

• GitHub and GitHub Actions experience.
• Hands‑on experience with Azure cloud security.
• Familiarity with Splunk, IaC tools, and automation using AWS CLI, Python, or PowerShell.
• Exposure to containerisation (Docker, Kubernetes) and DevOps practices.

A 50-50 joint venture between Tesco and VMO2 that was established back in 2003, Tesco Mobile has gone from strength to strength as we’ve launched into new services and markets. With more than 5 million customers, we’re the largest mobile virtual network operator in the UK. We’re proud to have an inclusive culture that’s uniquely Tesco Mobile, with a strong sense of community, plus all the benefits of working for one of the shareholders.

We care for human connection and we keep our customers at the heart of everything we do, which is why we’ve embraced the Agile way of working. Agile is more than just a methodology – it’s a liberating journey that puts customers and purpose first. It empowers us to self‑organise, collaborate, co‑create and rapidly inspect and adapt everything we do – allowing us to respond at pace to our customers’ needs. It encourages variety of thought and enables us to thrive, both individually and collectively.

We are proud to have an inclusive culture at Tesco where everyone truly feels able to be themselves. At Tesco, we not only celebrate diversity, but recognise the value and opportunity it brings. We're committed to creating a workplace where differences are valued, and make sure that all colleagues are given the same opportunities. We’re proud to have been accredited Disability Confident Leader and we’re committed to providing a fully inclusive and accessible recruitment process. For further information on the accessibility support we can offer, please click here.

We’re a big business and we can offer a range of diverse full‑time & part‑time working patterns across our many business areas, which means that we can find something that works for you. We work in a more blended pattern – combining office and remote working. Our offices will continue to be where we connect, collaborate and innovate. If you are applying internally, please speak to the Hiring Manager about how this can work for you – Everyone is welcome at Tesco.