Cloud Infrastructure Architect/Engineer

Flint UK Technology Services; City of Westminster; On-site; GBP 65,000 - 90,000; Full time

Job summary

Flint UK Technology Services is seeking a Cloud Network Infrastructure engineer to deliver and support mission‑critical infrastructure across private and hybrid cloud environments. You will modernise platforms with Kubernetes, storage, virtualisation, and directory services, combining hands‑on engineering with architecture design.

You will work on Windows AD migrations, OS patching, Kubernetes, Proxmox virtualization, and ESXi optimization, while contributing to automation, lab testing, and

Qualifications

• Experience in Linux (RHEL or equivalent) and Windows environments.
• Kubernetes design, deployment, and operations.
• Proven Active Directory migration and management experience.
• Storage tech experience (Ceph, SAN/NAS, or enterprise storage).
• Strong infrastructure automation and scripting (e.g., Python, Shell).

Responsibilities

• Design and migrate Windows AD to new environments.
• Implement and maintain OS patching for Linux and Windows.
• Build virtualisation environments (e.g., Proxmox) and migrate ISE from VMware.
• Support Kubernetes clusters design, deployment, and operations.
• Support cloud infrastructure in private and hybrid environments.
• Optimize ESXi environments and migration strategies.
• Participate in on-call rotation and incident resolution.
• Produce high-level and low-level design docs and runbooks.

Skills

Kubernetes

Linux

Windows

Networking fundamentals

Scripting

Active Directory migration

L3 troubleshooting

Tools

Proxmox

VMware ESXi

Ceph

SAN/NAS

OpenStack

Job description

The role is part of their Cloud Network Infrastructure (CNI) team responsible for delivering and supporting mission-critical infrastructure across private and hybrid cloud environments.

You will play a key role in modernising infrastructure platforms, including Kubernetes, storage, virtualisation, and directory services, ensuring high availability and operational efficiency.

The role involves both hands-on engineering and design activities, supporting ongoing transformation initiatives and BAU support of critical systems.

Key Responsibilities

• Design and execute Windows Active Directory migration to new environments
• Design, Implement and maintain OS patching solutions for both Linux and Windows platforms aligned with best practices
• Build and configure a virtualisation environments (eg Proxmox) to migrate ISE from VMware to the new environment
• support the implementation of the new Kubernetes (K8s) clusters,
• Support build, integration, and operation of cloud infrastructure (private and hybrid cloud environments)
• Assess and optimise existing ESXi environments, including defining and executing exit/migration strategies
• Support hardware installation and infrastructure deployment activities where required
• Perform level 3 troubleshooting and incident resolution across infrastructure and platform layers
• Work with internal engineering and architecture teams to define and improve future platform designs
• Support automation, provisioning, and orchestration for infrastructure deployments
• Conduct testing and validation in lab environments for new releases, patches, and infrastructure changes
• Produce technical documentation including HLD, LLD, and operational procedures (MoP/runbooks)
• Participate in operational support including on-call rota if required
• Kubernetes (design, deployment, operations)
• Virtualisation platforms (VMware ESXi and Proxmox)
• Solid experience in Linux (RHEL or equivalent) and Windows environments
• Experience with storage technologies including CEPH, SAN/NAS, or enterprise storage platforms
• Proven experience in Active Directory migration and management
• Strong understanding of infrastructure automation and Scripting (eg Python, Shell)
• Experience troubleshooting complex infrastructure issues (L3 support)
• Knowledge of cloud platforms (OpenStack, AWS, Azure or similar)
• Experience working in mission-critical/high availability environments
• Strong understanding of networking fundamentals and infrastructure integration

Desirable Skills

• Experience with:
• OpenStack/Mirantis
• Infrastructure APIs (REST, automation tooling)
• Enterprise backup and storage systems
• Exposure to hybrid cloud environments
• Experience working with telecoms or highly regulated environments