Senior Cloud Platform Architect — AWS-First, London

LEGO Digital Play; Greater London; Hybrid; GBP 120,000 - 150,000; Full time

Job summary

LEGO Digital Play is seeking a Senior Infrastructure Engineer, Cloud, to own the architecture of the cloud foundation for a new venture. You will define landing zones, infrastructure as code, security, observability and cost, and set the technical standards engineers follow across the organisation.

This is a senior individual contributor role, leading through technical judgement, design reviews and mentoring rather than line management.

Qualifications

• Extensive senior/lead cloud infrastructure experience guiding cloud platforms in production.
• Deep AWS expertise including multi-account setups, IAM, networking, and managed data services.
• Expert-level Terraform with module architectures and CI/CD-driven workflows adopted by teams.
• Proven track record of designing reliability and observability systems and incident practices.
• Security- and privacy-minded with experience in regulated consumer environments (GDPR/COPPA).

Responsibilities

• Own the architecture of the cloud foundation, AWS-first and expanding to Google Cloud where needed.
• Set security posture with least-privilege IAM, encryption at rest/in transit, and audit logging.
• Define Terraform standards, module architecture, and CI/CD workflows for the organisation.
• Design paved roads and self-service tooling for fast, reliable delivery to engineering teams.
• Drive reliability and observability strategy with SLOs, metrics, tracing, and log aggregation.
• Lead infrastructure design for GPU-heavy workloads and ML platform needs.
• Own cost architecture and FinOps, making trade-offs between cost, performance and resilience.
• Mentor engineers, lead design reviews and write technical proposals.

Skills

Cloud architecture leadership

AWS at scale

Observability

FinOps / cost architecture

Mentoring

Security & privacy

AI tooling fluency

Influence without authority

Tools

Terraform

CloudWatch

Grafana

Prometheus

OpenSearch

CI/CD tooling

Job description

LEGO Digital Play is seeking a Senior Infrastructure Engineer, Cloud, to own the architecture of the cloud foundation for a new venture. You will define landing zones, infrastructure as code, security, observability and cost, and set the technical standards engineers follow across the organisation.

This is a senior individual contributor role, leading through technical judgement, design reviews and mentoring rather than line management.