Top Infrastructure Engineer Jobs in London

The Staff Infrastructure Security Engineer will lead security initiatives, set architectural patterns, conduct security reviews, and mentor engineers while ensuring security in cloud infrastructures for GitLab.

Contract networking and infrastructure engineer to assess, document and remediate multi-site network environments across the UK. Deploy and configure Cisco networking, FortiGate firewalls, vulnerability monitoring and security appliances, support incident/change management, produce technical documentation, and collaborate with cyber security teams and suppliers. Extensive UK travel with frequent overnight stays.

Design, build, and maintain scalable, fault-tolerant serving platforms for LLMs. Integrate models for production and research, implement monitoring and observability, perform architecture reviews, and lead cross-functional end-to-end projects enabling LLM capability discovery and high-performance serving.

Design, build, and operate a secure, high-performance sandboxing platform and client library for code execution across containerized and virtualized environments. Ensure strong isolation, optimize latency and resource use, debug and reduce errors, respond to incidents, and drive roadmap and architecture reviews while partnering with internal users.

The role involves building and operating ML systems and infrastructure for large foundation models, data pipelines, and experiment orchestration in a collaborative environment.

Lead the development of AI/ML infrastructure for simulations using large foundation models. Collaborate on realistic simulation improvements and mentor junior engineers.

Design, implement, and automate cloud infrastructure on AWS using Terraform, Kubernetes, Helm, and GitHub Actions. Build production-grade clusters, create deployment pipelines, implement monitoring with Prometheus/Grafana/ELK, enforce infrastructure security controls, optimize cost and performance, and produce documentation and RFP contributions while collaborating across teams.

Build and maintain infrastructure, tools and services to support AI research and engineering. Deploy and operate services with Kubernetes and Docker, manage cloud infrastructure (Terraform/AWS), support CI/CD, and enable ML application deployment, orchestration, and accelerator hardware management.

Lead ownership of Azure cloud infrastructure: design and enforce RBAC, build monitoring and centralized logging, optimise scalability and cost, own CI/CD and IaC (Terraform/Bicep), mentor engineers, and implement security and observability best practices for a growing AI healthtech platform.

Design, build, and maintain scalable, secure cloud infrastructure across AWS and Azure using Terraform, Docker, and CI/CD. Manage production environments, monitoring, security, IAM, secrets management, automation, cost optimization, and collaborate with dev/DevOps teams to ensure high availability and reliability.

Responsible for the infrastructure behind ACRA, focusing on Kubernetes, networking, storage, and production operations. Will design, build, and improve core infrastructure layers while ensuring operational reliability and security.

Own end-to-end customer deployments of Sierra's AI platform: architect, deploy, upgrade, and operate infrastructure in customer cloud environments; build repeatable tooling, runbooks, and automation; partner with engineering, security, sales, and customer success to meet security, compliance, and operational requirements.

The Senior Infrastructure Engineer will own the cloud stack, enhance observability, architect browser cloud infrastructure, debug operational issues, and mentor other engineers, while managing multiple production workloads at scale.

As a Senior Cloud Infrastructure Engineer, you will manage Langfuse's cloud operations on AWS, ensuring high uptime and performance while optimizing costs. You'll own the observability setup with Datadog, automate processes, and make self-hosting seamless for users. You'll also focus on scaling infrastructure and maintaining security compliance.

As a Cloud Infrastructure Engineer, you will enhance Optiver's cloud systems for digital assets trading, focusing on performance, security, and resilience. Responsibilities include designing low-latency infrastructure, implementing CI/CD for changes, and managing cloud performance setups.

Hands-on senior cloud infrastructure engineer to design, build, and run a multi-tenant AWS SaaS hosting platform. Responsibilities include Terraform and Puppet infrastructure, Python automation, etcd-based service discovery, multi-tier caching, observability (Prometheus/Grafana/Loki), incident response, and platform reliability improvements.

The MS Cloud Infrastructure Engineer manages cloud infrastructure deployment, supports operations, coaches junior engineers, and evaluates hardware/software solutions.

The Senior AI Compute Infrastructure Engineer will manage and optimize GPU and accelerator clusters for AI workloads, collaborate with teams, and ensure reliable performance and cost efficiency.

Own end-to-end customer deployments of Sierra's AI platform: architect, deploy, upgrade, and operate infrastructure in customer cloud environments. Define standards, tooling, runbooks, and automation for repeatable deployments while partnering with engineering, product, sales, and customer teams to meet security, compliance, and operational requirements.

Build, maintain, and secure cloud infrastructure and CI/CD pipelines. Manage VMs, containers, orchestration, networking, and PostgreSQL production databases. Implement automation, observability, backup/replication, and incident response; document runbooks and support deployments across environments.

Build and maintain internal shared engineering services: improve observability, CI/CD, and infrastructure as code; operate cloud-managed services and VMs; collaborate cross-functionally, own projects end-to-end, participate in incident response, and improve system scalability and stability.

Deploy and maintain AI enablement infrastructure (MCP servers, AI agents, hosting) and cloud environments on AWS/GCP. Build IaC and CI/CD pipelines, monitor performance/cost, support containerized services, manage API keys and permissions, document runbooks, and collaborate with Security, Engineering, and stakeholders to improve cloud governance and AI tooling adoption.

Monitor, optimise and maintain the RON network including VLAN, switch/router/firewall configuration, firmware upgrades, backup/recovery, threat/patch validation in test and production environments, documentation, access control, and remediation/change implementation.

The Cloud Infrastructure Engineer will design scalable cloud infrastructure, manage multi-cloud environments, and ensure system availability while collaborating with development teams and optimizing CI/CD processes.

P6 Planners/Planning Engineers manage Level 1 and Level 2 schedules, support project teams with planning responsibilities, and ensure adherence to scheduling processes and contract requirements.