Senior Infrastructure Engineer

Pearson Whiffin Recruitment Group; Belfast City District; On-site; GBP 70,000 - 95,000; Full time

Job summary

Pearson Whiffin Recruitment Group seeks an experienced Senior Infrastructure Engineer focused on cloud, platforms and design assurance. You will review HLDs/LLDs, challenge architectures, and guide secure, scalable hybrid infrastructure projects across on‑premise and cloud.

You will work with architects, engineers and third parties to deliver robust solutions. The role emphasizes hands-on engineering with governance, automation and modernisation strategies to align with business and operational

Qualifications

• Strong experience with Microsoft Azure cloud infra, networking and identity.
• Knowledge of Microsoft 365 enterprise services.
• Extensive VMware virtualization (vSphere/vSAN).
• Experience designing hybrid hosting environments.
• Understanding of cloud-native architectures and modernization.
• Familiarity with IaC, automation and DevOps (Terraform, Bicep, PowerShell).
• Exposure to containers, Kubernetes or other cloud-native platform tech.
• Security by design concepts including IAM, vulnerability management and security controls.
• Familiar with Defender, Entra ID and Microsoft Sentinel.
• Knowledge of architecture governance frameworks or design authorities.

Responsibilities

• Review and challenge High-Level Designs (HLDs) and Low-Level Designs (LLDs).
• Provide technical oversight across infrastructure projects and identify risks.
• Support design and evolution of cloud, virtualised and hybrid infra.
• Contribute to infrastructure transformation and modernisation initiatives.
• Act as senior technical authority across core infra technologies.
• Ensure security, resilience, availability and DR considerations are included.
• Collaborate with architects, engineers, security teams and suppliers.
• Identify opportunities to improve performance, reliability, and automation.

Skills

Azure cloud

VMware virtualization

Hybrid hosting

Security by design

IaC automation

DevOps practices

Architecture governance

Design review (HLD/LLD)

Technical leadership

Tools

Terraform

Bicep

PowerShell

Kubernetes

VMware vSphere/vSAN

Defender/Entra ID/Sentinel

Job description

Senior Infrastructure Engineer – Cloud, Platforms & Solutions Design

We are looking for an experienced Senior Infrastructure Engineer with a strong focus on infrastructure solutions, technical design and architecture assurance to join our technology team.

This is an excellent opportunity for a technically accomplished engineer who enjoys working across complex infrastructure environments, reviewing solution designs and ensuring technology solutions are robust, scalable, secure and fit for purpose.

The successful candidate will bring a broad understanding of cloud, on-premise and hybrid infrastructure technologies, with the ability to challenge technical designs, identify risks and provide practical recommendations to ensure solutions align with business requirements, architectural standards and operational needs.

This role would suit someone who combines strong hands‑on infrastructure engineering experience with a solutions-focused mindset, and who is comfortable working with architects, project teams, technical specialists and third‑party suppliers.

Key Responsibilities

• Solution Design & Assurance: Review and challenge High‑Level Designs (HLDs) and Low‑Level Designs (LLDs), ensuring proposed infrastructure solutions are technically sound, fit for purpose, supportable and aligned with architectural principles.
• Technical Governance: Provide technical oversight and assurance across infrastructure projects, identifying design gaps, technical risks, dependencies and opportunities for improvement.
• Cloud & Platform Engineering: Support the design, implementation and evolution of cloud, virtualised and hybrid infrastructure environments.
• Infrastructure Modernisation: Contribute to infrastructure transformation initiatives, including cloud adoption, platform consolidation, migration and modernisation.
• Technical Expertise: Act as a senior technical authority across core infrastructure technologies, providing guidance, recommendations and technical challenge to internal teams and external partners.
• Security by Design: Ensure infrastructure solutions incorporate appropriate security, resilience, availability, disaster recovery and operational considerations.
• Stakeholder Collaboration: Work closely with solution architects, cyber security teams, engineering teams and delivery partners to translate business requirements into effective technical solutions.
• Continuous Improvement: Identify opportunities to improve infrastructure performance, reliability, scalability, automation and operational efficiency.

We are looking for candidates with a strong technical background across several of the following areas:

• Strong experience with Microsoft Azure, including cloud infrastructure, networking, identity, governance and hybrid integration.
• Good working knowledge of Microsoft 365 and associated enterprise services.
• Extensive experience with VMware virtualisation technologies, including vSphere and vSAN.
• Experience supporting and designing hybrid hosting environments, integrating on‑premise infrastructure with public cloud services.
• Understanding of cloud‑native technologies, modern platform architectures and infrastructure modernisation.

Solutions Design & Technical Assurance

• Proven experience reviewing, validating and contributing to High‑Level Designs (HLDs) and Low‑Level Designs (LLDs).
• Ability to assess infrastructure solutions against functional and non‑functional requirements, including performance, resilience, scalability, security and supportability.
• Strong understanding of infrastructure architecture principles, technical standards and design best practices.
• Experience identifying technical risks, challenging proposed solutions and recommending pragmatic alternatives.
• Ability to engage confidently with architects, engineers, technical stakeholders and third‑party suppliers.
• Experience or a strong understanding of cyber security principles, including secure infrastructure design, identity and access management, vulnerability management and security controls.
• Familiarity with Microsoft security technologies such as Defender, Entra ID and Microsoft Sentinel.
• Knowledge of Infrastructure as Code (IaC), automation and DevOps practices, including Terraform, Bicep or PowerShell.
• Exposure to containers, Kubernetes or other cloud‑native platform technologies.
• Experience working within architecture governance frameworks or technical design authorities.
• Relevant Microsoft Azure, VMware or cyber security certifications.