Cloud Principal Architect

Location: Greater London

Why work for us

A career at Janus Henderson is more than a job its about investing in a brighter future together.

Our Mission at Janus Henderson is to help clients define and achieve superior financial outcomes through differentiated insights disciplined investments and world‑class service. We will do this by protecting and growing our core business amplifying our strengths and diversifying where we have the right.

Our Values are key to driving our success and are at the heart of everything we do :

Clients Come First – Always Execution Supersedes Intention Together We Win Diversity Improves Results Truth Builds Trust

If our mission values and purpose align with your own we would love to hear from you!

Your opportunity

The Principal Architect Cloud is a senior technical leader responsible for designing and guiding enterprise cloud architecture across Microsoft Azure as a key member of Infrastructure Architecture team. This role demands deep hands‑on expertise in cloud infrastructure, networking, identity, container platforms and integration patterns. The architect will lead strategic initiatives including Azure Landing Zones, cloud migrations, Kubernetes‑based microservices, SD‑WAN / SASE integration, API architecture and Infrastructure‑as‑Code (IaC) using Terraform while working closely with the Head of Strategy Architecture & Platform Engineering.

Cloud

Architecture & Strategy

• Define and evolve enterprise cloud architecture standards, reference models and reusable patterns
• Architect scalable, secure and cost‑optimized solutions across Azure IaaS, PaaS and container platforms
• Lead cloud modernization initiatives including migration of legacy workloads to Azure
• Collaborate with leadership to align cloud architecture with business and platform engineering strategy

Azure Expertise

• Design and implement Azure Landing Zones with governance, security and subscription strategy
• Architect solutions using Azure services:
  App Services, AKS, Functions, Logic Apps, Storage, Networking
• Lead multi‑region high‑availability and disaster recovery architecture
• Define tagging policy and resource hierarchy strategies for enterprise‑scale environments

Kubernetes & Microservices

• Architect and guide deployment of microservices on Azure Kubernetes Service (AKS)
• Define service mesh, ingress, autoscaling and observability strategies
• Ensure cloud‑native design principles and Dev Sec Ops  integration
• Optimize container orchestration and runtime performance

Cloud Networking & Connectivity

• Design and implement complex Azure networking: VNets, peering, Express Route, VPN, firewalls, private endpoints
• Architect secure connectivity between cloud and on‑premises environments
• Integrate SD‑WAN and SASE solutions for secure scalable edge connectivity
• Lead network segmentation, routing, DNS and traffic‑management strategies

Identity & Access Management

• Architect and manage Cloud Entra  (Azure AD) for identity federation and access control
• Implement SSO, RBAC, conditional access and multi‑tenant identity models
• Ensure secure integration of identity across cloud services and applications

Cloud Migration

• Lead migration strategy and execution from on‑premises data centers to Azure
• Define migration waves, landing‑zone readiness and workload prioritization
• Collaborate with infrastructure, application and security teams to ensure smooth transitions

API Integration & Design

• Design and govern enterprise API architecture for cloud‑native and hybrid applications
• Define standards for API security, versioning, throttling and lifecycle management
• Integrate APIs across internal platforms, third‑party services and edge environments

Infrastructure‑as‑Code (IaC) & Automation

• Lead IaC strategy and implementation using Terraform (preferred), Bicep or ARM templates
• Define reusable modules, state management and secure provisioning workflows
• Integrate IaC into CI / CD pipelines and platform automation frameworks

Governance Monitoring & Optimization

• Define cloud governance frameworks and operational guardrails and align to Enterprise Architecture Guild and Tech Architecture Board (TAB) representation from Infrastructure Architecture team
• Architect observability solutions using Azure Monitor, Log…