SENIOR DEVOPS ENGINEER - REMOTE in Oxford

Senior DevOps Engineer AWS / Kubernetes / DevSecOps Location: Greater Oxford Area Hybrid Contract: Permanent Working Pattern: Flexible & Hybrid Salary: Competitive Security Clearance: UK security clearance eligibility required (British Passport + 5 years of continuous residency in the UK) About the Role We are working with a fast-growing UK technology company developing advanced AI and robotics systems for defence, national security, critical infrastructure and other mission-critical environments. The business is looking for a Senior DevOps Engineer to take ownership of the cloud and platform infrastructure underpinning its next generation of AI products. This is a hands-on senior engineering position for someone with deep expertise across AWS, Kubernetes, infrastructure as code, CI/CD and cloud security . You'll be responsible for designing, building and maintaining highly available infrastructure, automating software delivery, strengthening cloud security and helping establish the operational processes required to support a growing technology organisation. You'll have genuine ownership of the platform and the opportunity to influence architecture, engineering standards and DevSecOps practices across the wider team. What You'll Be Doing Cloud & Infrastructure Architect, implement and maintain multi-account, multi-region AWS environments . Kubernetes & Platform Engineering Administer and optimise Kubernetes environments , including AWS EKS and OpenShift. Manage Helm-based application deployments and platform configuration. Enable automated, repeatable and low-risk deployments. Automate repetitive operational processes using Bash, Python or Go . Support zero-touch deployment and infrastructure provisioning. Implement and maintain AWS security best practices across IAM, networking and workloads. Integrate SAST and DAST practices into development and deployment pipelines. Maintain secure software supply chains, including AMI and container image scanning. Develop proactive monitoring, alerting and performance-tuning strategies. Help maintain service-level objectives and platform availability. Backup, Disaster Recovery & Resilience Design and maintain AWS Backup strategies. Identify opportunities for AWS cost optimisation. Make effective use of AWS Compute Optimizer, Savings Plans and Graviton . Balance performance, availability, security and cost when making infrastructure decisions. Maintain infrastructure provenance and configuration records. Help ensure engineering practices remain aligned with relevant industry standards. Work with development teams to embed DevSecOps practices throughout the software lifecycle. What We're Looking For We're looking for a seasoned DevOps or SRE professional who combines strong hands-on technical skills with a pragmatic, collaborative approach . Proven professional experience in DevOps, SRE or Cloud Engineering , with recent hands-on AWS experience. Expert knowledge of core AWS services including EC2, VPC, IAM, S3, ALB/ELB, CloudFront, ECR/ECS and Control Tower . Strong experience with AWS security tooling, including GuardDuty, IAM Identity Center and CloudWatch . Strong knowledge of Helm and Kubernetes application deployment. Experience building and administering on-premises Kubernetes environments . Excellent Linux systems administration skills. Experience implementing SAST and DAST within software delivery pipelines. Strong scripting and automation skills using Bash, Python and/or Go . Experience implementing SSO across enterprise and industry-standard software platforms. Extensive on-premises Kubernetes deployment experience. AWS Karpenter. AWS Compute Optimizer. Security Clearance Due to the nature of the work, applicants must be eligible to obtain UK security clearance . Applicants will generally need to: Hold a UK passport . Clearance sponsorship may be available for the right candidate. If you are not eligible for UK security clearance, unfortunately we will not be able to progress your application. What We're Looking For Beyond the Technology This is a small, highly collaborative engineering team, so attitude and communication are just as important as technical ability. Balancing speed of delivery with security, reliability and long-term maintainability. This is an opportunity to work on infrastructure that sits beneath frontier AI and robotics systems operating in demanding real-world environments . You'll have genuine ownership of the platforms you build and the opportunity to influence how the organisation approaches cloud infrastructure, security, reliability and DevOps as it scales. Build and harden infrastructure supporting advanced AI systems. Work across AWS, Kubernetes, automation and security. Benefits Competitive salary. Flexible and hybrid working. Company pension with employer contribution. Private healthcare. 29 days' annual leave plus public holidays. Opportunity to work on advanced AI, robotics and cloud infrastructure. Apply If you're a senior DevOps, SRE or cloud engineer who enjoys building secure, reliable infrastructure and wants genuine ownership of the platforms supporting advanced AI systems, we'd like to hear from you. Please apply with an up-to-date CV highlighting your experience across AWS, Kubernetes, Terraform, CI/CD, DevSecOps and cloud security , together with details of any existing UK security clearance. We are committed to creating an inclusive working environment and welcome applications from candidates regardless of race, gender, religion, sexual orientation, age, disability or parental status.