Senior DevOps Engineer

This role is based in our 240 Blackfriars, London office.
We’re looking for a Senior DevOps Engineer to own and evolve our Windows-based infrastructure running in AWS. This role is focused on operational excellence, security, automation, and developer enablement.
You’ll work closely with product engineering teams to ensure systems are secure, reliable, and easy to deploy, while driving improvements in CI/CD, monitoring, and infrastructure automation.
What You’ll Do
Manage and operate Windows Server environments in AWS (EC2), ensuring high availability and performance
Own patching, vulnerability management, and system hardening processes across Windows workloads
Monitor and respond to security events, working closely with security teams to remediate risks
Build and maintain CI/CD pipelines to support consistent, reliable application deployments
Implement and improve Infrastructure as Code (IaC) using Terraform or similar tools
Develop automation using PowerShell and scripting to reduce manual operational overhead
Design and maintain monitoring, alerting, and logging systems to ensure system health
Partner with product engineering teams to troubleshoot application and infrastructure issues
Support releases and ensure smooth deployment processes across environments
Participate in on-call rotations and act as an escalation point for production incidents
Lead or contribute to incident response and post-mortems, driving long-term improvements
Core Tech Stack
AWS (Primary)
EC2 (Windows workloads), VPC, IAM
S3, EBS, Systems Manager (SSM)
CloudWatch (or integration with tools like Datadog)
Load Balancers (ALB/NLB)
Infrastructure & Automation
Terraform (preferred) or CloudFormation
CI/CD: GitLab CI, GitHub Actions, Jenkins, or similar
Microsoft / Windows
Windows Server administration
MS SQL Server (standalone and AWS RDS)
Active Directory / identity integration
IIS and .NET application hosting
PowerShell scripting and automation
Observability & Operations
Monitoring and alerting platforms (Datadog, CloudWatch, etc.)
Logging and incident response tooling
What We’re Looking For
Extensive experience in DevOps, Cloud Engineering, or Systems Engineering
Strong hands-on experience with AWS in production environments
Proven experience managing Windows Server infrastructure (preferably in AWS)
Experience with patching, vulnerability remediation, and security event handling
Strong experience building and maintaining CI/CD pipelines
Experience with Infrastructure as Code (Terraform strongly preferred)
Strong scripting skills in PowerShell
Experience with monitoring, alerting, and troubleshooting production systems
Ability to collaborate closely with engineering teams and support production workloads
Nice to Have
Experience with Active Directory integration in AWS (Managed AD, AD Connector)
Familiarity with Sitecore CMS, other .NET applications and IIS in production
Experience with AWS Systems Manager (SSM) for patching and automation
Exposure to containerisation (Docker/Kubernetes)
Experience with Datadog or OpenTelemetry-based observability
Understanding of FinOps and cloud cost optimisation
What Makes You Successful
You prioritise automation, reliability, and repeatability in everything you build
You take ownership of systems and drive issues through resolution
You’re comfortable working in production environments and handling incidents
You collaborate effectively with engineering and security teams
You continuously look for ways to reduce toil and improve system stability

Employment type
Full-time

Work arrangement
No