GCP Architect

Job Title: GCP Architect

6 month contract Inside IR35 Onsite London Must have GCP experience

Job Description

This GCP Architect role supports a strategic cloud transformation programme that is migrating critical workloads onto a cloud-native Google Cloud Platform (GCP) infrastructure. You will act as the primary authority for architecture design and documentation, owning the production of the High Level Design Document (HLDD), driving governance approvals, and supporting the platform through Permit to Operate stages to General Availability. This is an output-driven contract position that requires deep GCP expertise and experience in complex, regulated environments.

Responsibilities

• Lead the end-to-end production of the GCP High Level Design Document (HLDD), covering network topology, landing zone architecture, identity and access management (IAM), data platform services, compute, security controls, and operational tooling.
• Act as the primary architecture design and documentation authority for the programme, ensuring all designs are robust, compliant, and aligned with enterprise standards.
• Contribute to platform architecture design decisions in collaboration with platform engineers, enterprise architects, security teams, and risk stakeholders.
• Maintain and continuously update the Architecture Design Register, ensuring all design decisions, changes, and dependencies are clearly documented and traceable.
• Prepare structured submission packs for Architecture Review Boards and Design Authority forums, presenting and defending design proposals as required.
• Own the design workstream across all Permit to Operate gates, ensuring all architectural requirements and controls are clearly defined and evidenced.
• Produce and maintain detailed design diagrams and supporting artefacts to communicate architecture clearly to technical and non-technical stakeholders.
• Ensure all architecture documentation and governance evidence is complete, reviewed, and approved ahead of each programme milestone.
• Support the platform through the full life cycle from initial design through governance approvals to General Availability, addressing design-related queries and risks.
• Produce a comprehensive General Availability readiness report, confirming that the platform design, controls, and documentation meet all required standards.
• Coordinate the handover of architecture artefacts and knowledge to operations teams at General Availability, ensuring a smooth transition into steady-state support.

Essential Skills

• Extensive, hands-on experience with Google Cloud Platform (GCP) in complex, regulated environments.
• Proven track record in designing and documenting cloud-native architectures at enterprise scale.
• Strong expertise in GCP landing zone design, including network topology, segmentation, and connectivity patterns.
• Deep knowledge of GCP Identity and Access Management (IAM), including roles, policies, and access control best practices.
• experience defining and implementing security controls and guardrails within GCP environments.
• Demonstrable experience producing High Level Design Documents (HLDD) and other formal architecture artefacts.
• Strong background in navigating architecture governance processes, including Architecture Review Boards and Design Authorities.
• Ability to lead a design workstream end-to-end, from initial concept through to production readiness and General Availability.
• Excellent written communication skills for clear, structured documentation and governance submissions.
• Strong stakeholder management skills, with the ability to collaborate effectively with engineers, architects, security, and risk teams.

Additional Skills & Qualifications

• experience working on large-scale transformation or modernisation programmes.
• background in designing data platform services and compute workloads on GCP.
• Familiarity with operational tooling and observability solutions in cloud environments.
• experience working within formal Permit to Operate or similar production readiness frameworks.
• Ability to produce clear, visually effective design diagrams for diverse audiences.
• Comfortable operating in an output-driven contract role with clear deliverables and deadlines.

London, UK

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