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# Senior Infrastructure Engineer

- **Company:** LEGO Digital Play
- **Location:** London, United Kingdom
- **Experience:** Expert
- **Salary:** £62,799
- **Contract:** Permanent contract
- **Skills:** Amazon Web Services, Audit Trail, Continuous Integration, Data as a Services, Identity and Access Management, Machine Learning, Prometheus, Google Cloud, Grafana, Machine Learning Operations, Cloudwatch, Terraform, OpenSearch
- **Published:** October 31, 2026
- **Apply:** https://www.adzuna.co.uk/jobs/details/5947727463

## About the Role

* Substantial experience as a senior or lead infrastructure engineer, with a track record of setting technical direction for cloud platforms running in production.
 * Deep expertise in AWS at scale, including multi-account architecture, networking, IAM, managed data services and containerisation, with the judgement to know when to keep things simple.
 * Expert-level Terraform, having designed module architectures, state strategies and CI/CD-driven infrastructure workflows that other teams have adopted.
 * You will have built a cloud foundation from a low or zero baseline before, making and revisiting the early architectural decisions yourself.
 * A track record of designing reliability and observability systems, including SLO frameworks and incident practices, with tools such as CloudWatch, Grafana, Prometheus or OpenSearch.
 * Security- and privacy-minded, with experience designing infrastructure for regulated consumer environments and working knowledge of GDPR and COPPA.
 * Fluency with modern AI tooling in development and operations, using it to move faster while retaining the judgement to catch its failures and stand behind the quality of what ships.
 * Able to influence without authority: writing clear technical proposals, explaining trade-offs to technical and non-technical audiences, and mentoring other engineers., * Production experience with Google Cloud alongside AWS.
 * Experience designing infrastructure for machine learning workloads, including GPU orchestration, model serving (Triton, vLLM or equivalent) and MLOps tooling.
 * Experience leading the design of an internal developer platform or paved-road system.
 * Background in games or interactive-media infrastructure, including content and asset pipelines.
 * Experience in brand-safe or regulated consumer ecosystems such as children's products, health or fintech.

## Description

* Own the architecture of the cloud foundation, AWS-first and extending to Google Cloud where needed, making the key decisions on landing zones, account and project structure, networking and secrets management.
 * Set the security, privacy and compliance posture at the infrastructure layer, designing least-privilege IAM, encryption at rest and in transit, audit logging and controls that meet GDPR and COPPA requirements by default.
 * Define the Terraform standards, module architecture and review practices the wider engineering organisation builds on, and hold the bar on quality.
 * Design paved roads and self-service tooling that let engineering teams ship reliably and quickly without reinventing the basics, treating internal teams as customers.
 * Drive the reliability and observability strategy, including SLO frameworks, metrics, tracing, log aggregation and incident practices, and lead on the most complex production issues.
 * Lead infrastructure design for compute-intensive and specialised workloads, including GPU capacity and machine learning platform needs, in partnership with the teams that depend on them.
 * Own cost architecture and FinOps practice, building cost visibility in from the start and making the trade-offs between cost, performance and resilience explicit.
 * Mentor engineers, lead design reviews and write the technical proposals that shape how the infrastructure team and its standards develop.