Top Network Engineer Jobs in London

Designs, deploys, and supports global enterprise network infrastructure spanning LAN, WAN, wireless, firewalls, load balancing, and security. Owns network projects from requirements through implementation and handoff, manages vendors, supports office build-outs, and travels globally as needed. Implements monitoring, SIEM, compliance, incident response, automation, and infrastructure-as-code practices. Serves as an escalation point for complex wired and wireless issues while contributing to maintenance, upgrades, documentation, and operational improvements.

Build, operate, and scale CrowdStrike's global backbone and hybrid cloud networks. Design and implement IP and optical solutions, drive capacity planning, evaluate technologies, automate with IaC and CI/CD, support cloud networking, lead projects from ideation to implementation, and participate in 24x7 on-call rotation.

Lead engineering and operate enterprise perimeter, proxy, and SSE/SASE services. Architect and implement ZTNA, IAP, SWG/proxy patterns, enforce identity/device/context policies, integrate with cloud and colocation interconnects, drive governance, automation, observability, and AI-assisted engineering adoption while coordinating cross-team delivery and remediation in the US.

Lead design, build, and operate enterprise perimeter, proxy, and SSE/SASE security solutions. Architect ZTNA/IAP patterns, integrate SWG capabilities, enforce identity- and context-based policies, drive governance, roadmap, cross-team delivery, operational excellence, and adoption of AI-assisted engineering practices to improve security, stability, and automation.

Design and operate multi-region Azure and AWS cloud networking and security for Kubernetes fleets, focusing on isolation, segmentation, egress control, and auditability for agentic AI workloads. Define infrastructure as code with Terraform, harden identity integration, use AI for monitoring and runbooks, and collaborate with Kubernetes and product teams to resolve complex networking issues.

Join Qube Research & Technologies as a Network Engineer responsible for designing large-scale datacentre networks, ensuring high-performance connectivity, and collaborating with teams to enhance infrastructure and troubleshooting.

Operate and support low-latency global network infrastructure across on-prem and cloud. Troubleshoot routing, MPLS, firewalls, and packet-level issues; perform incident response, customer onboarding, change execution, monitoring, automation, and deep packet analysis to reduce MTTR and improve observability.

Designs, implements, operates, and maintains Marex’s global network infrastructure. Responsibilities include network consultancy, operational support, security design, troubleshooting, vendor management, cloud networking, automation, infrastructure as code, and reporting. The role supports WAN, campus LAN, firewalls, exchange connectivity, and low-latency networks while ensuring regulatory compliance and operational resilience.

Own end-to-end network design and delivery for GPU infrastructure deployments. Translate customer requirements into network, cabling, and rack plans; coordinate third-party physical build partners remotely; validate deployments; manage five or more concurrent projects; troubleshoot post-deployment issues through customer handover; and select appropriate vendors and technologies.

Design, deploy, and operate lossless RDMA-capable leaf-spine fabrics for multi-tenant GPU clusters. Automate provisioning, build telemetry/observability, troubleshoot end-to-end performance, manage out-of-band and office networks, support tenant onboarding, and document designs while upskilling colleagues.

Design and manage GCP infrastructure using Terraform, integrate Vertex AI and BigQuery, implement Policies-as-Code (Rego), integrate Wiz for continuous security monitoring, automate tooling, enforce GCP security best practices, and collaborate with data and security teams.

Maintain and improve enterprise network infrastructure, own network systems and core services, troubleshoot escalated issues, support projects and change delivery, contribute to design and automation (IaC), remediate security vulnerabilities, and collaborate with stakeholders to drive performance, resilience and service improvements.

Support post-sales network solution engineering: translate designs into implementation plans, analyze customer network data, assist deployments, reconfigurations, and migrations, troubleshoot deployment package issues, and coordinate across engineering, field, and support teams under senior supervision.

Design, operate, troubleshoot, and automate secure enterprise routing, switching, wireless, WAN, and cloud connectivity. Balance platform architecture, standards, lifecycle planning, and automation with incident response, change safety, and operational delivery. Reduce recurring reactive work through software, APIs, Infrastructure-as-Code, Git workflows, testing, and CI/CD.

The Staff Network Engineer designs and optimizes global office networks, ensuring 99.9% uptime, and promotes security through Zero Trust Access while managing significant hardware investments.

Design, integrate, and support SCADA and OT networks for battery energy storage systems across EMEA. Lead system architecture, testing, troubleshooting, documentation, and customer technical interfaces. Monitor performance, drive root-cause analyses and continuous improvements, and support upgrades, lab testing, and field service activities with occasional travel.

Build and design proxy infrastructure from scratch, implement rotation systems, manage IP reputation, optimize for performance, and develop reverse proxy systems for various proxy types.

Apprentice Network Engineer to support IT infrastructure with emphasis on Microsoft 365 and general networking. Duties include M365 administration, configuring and troubleshooting network devices, first-level user support, assisting IT projects, maintaining documentation, and monitoring network performance under mentor supervision during an 18-month apprenticeship.

Design, build and operate highly available low-latency co-location network infrastructure. Optimize performance, timing and throughput; implement packet-capture and market connectivity; develop automation and tooling; monitor lifecycle and reliability; collaborate with platform teams; contribute to incident response and on-call support.

Provide end-to-end network support for a global client: own and resolve incidents, coordinate with vendors and BT teams, implement designs, troubleshoot routing, switching, wireless, Riverbed and security devices, mentor NOC/Service Desk, and follow change control and security practices.

Implement, test, deploy, troubleshoot and maintain REST API and SIP telecom solutions. Monitor and tune infrastructure for high availability, develop test automation, perform packet/protocol analysis, support deployments and upgrades, participate in Tier 3 on-call rotation, and identify continuous improvement opportunities.

Own live technical execution of enterprise network deployments: run pre-install prep, troubleshoot Layer 2/3 and ISP issues in real time, validate hardware and NOS, sign off networks going live, document progress, and feed recurring failures into tooling and playbooks to reduce rework and accelerate installs.

Responsible for designing, implementing and supporting networking solutions across multiple sites, maintaining firewalls, routing and security policies, troubleshooting outages and circuits, performing capacity planning and monitoring, ensuring compliance with public-sector security standards, participating in on-call rotation, and travelling to UK (and occasional international) sites.

Design, implement, and maintain datacenter, cloud, and office network infrastructure. Configure firewalls, VPNs, peering, multicast, and NAC. Install and cable datacenter hardware, collaborate with infra and dev teams, develop network automation, provide BAU support and on-call coverage, and produce technical documentation.

Design, build, secure and manage Azure networking and hybrid connectivity solutions (VNETs, routing, VPN/ExpressRoute, firewalls, load balancing, DNS). Implement security controls, monitoring, governance, troubleshooting, documentation and collaborate with architects, cyber specialists and stakeholders to deliver resilient cloud network services.