Senior DevOps Engineer

Location: Chilton

Senior Dev Ops Engineer AWS / Kubernetes / Dev Sec Ops

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 Dev Ops 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 Dev Sec Ops  practices across the wider team.

What You'll Be Doing Cloud & Infrastructure Architect, implement and maintain multi-account, multi-region AWS environments . Build and manage infrastructure using Terraform, Terraform Cloud, Helm and Cloud Formation . Design scalable, secure and highly available cloud-native infrastructure. Manage container registries and supporting platform services. Maintain and improve on-premises infrastructure where required. Kubernetes & Platform Engineering Administer and optimise Kubernetes environments , including AWS EKS and Open Shift.

Manage Helm-based application deployments and platform configuration. Support service-mesh technologies and distributed application architectures. Build robust container platforms using Docker and related technologies. Develop automation to reduce operational overhead and improve platform reliability. CI/CD & Automation Design and maintain modern CI/CD pipelines using Git Hub Actions and Argo CD . Enable automated, repeatable and low-risk deployments. Implement Git Ops practices where appropriate.

Automate repetitive operational processes using Bash, Python or Go . Support zero-touch deployment and infrastructure provisioning. Security & Dev Sec Ops  Lead cloud security and infrastructure posture reviews. Implement and maintain AWS security best practices across IAM, networking and workloads. Work with services such as Guard Duty, Cloud Watch and IAM Identity Center . Integrate SAST and DAST practices into development and deployment pipelines.

Maintain secure software supply chains, including AMI and container image scanning. Implement and monitor infrastructure and application security controls. Support the organisation's ongoing compliance and certification requirements. Reliability & SRE Establish and maintain observability across distributed systems. Develop proactive monitoring, alerting and performance-tuning strategies. Help maintain service-level objectives and platform availability. Investigate and resolve infrastructure and application incidents. Coordinate emergency changes, hot fixes and rollbacks.

Lead post-incident reviews and implement improvements to prevent recurrence. Backup, Disaster Recovery & Resilience Design and maintain AWS Backup strategies. Establish and test disaster recovery processes. Run regular restore and recovery exercises. Maintain appropriate RPO/RTO reporting and dashboards. Ensure critical infrastructure can be recovered reliably when required. Cost & Capacity Management Monitor infrastructure utilisation, availability and capacity. Lead regular capacity and availability reviews.

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. Governance & Compliance Support regular technical and security audits. Maintain infrastructure provenance and configuration records. Implement infrastructure drift detection across Terraform and Helm. Help ensure engineering practices remain aligned with relevant industry standards.

Work with development teams to embed Dev Sec Ops  practices throughout the software lifecycle. What We're Looking For We're looking for a seasoned Dev Ops or SRE…