Top Network Engineer Jobs in London

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.

Seeking a Senior Cloud Network Engineer to develop high-performance ethernet infrastructure on private clouds, and collaborate with various teams for deployment and integration of AI systems. Responsibilities include automation, maintenance, and user support, requiring extensive cloud and networking experience.

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 an EMEA colocation network switch refresh: configure devices in lab, coordinate racking and installs, execute migrations from legacy to new switches, validate post-migration, decommission old equipment, track progress, and coordinate stakeholders during migration windows.

Design, support, and maintain enterprise network systems (routers, switches, firewalls, VPNs, cloud networking). Monitor and troubleshoot network performance, implement secure scalable solutions (Zero Trust/SASE), document configurations, collaborate cross-functionally, and participate in on-call rotations to resolve incidents.

As an AWS Network Engineer, you will optimize and secure AWS cloud infrastructure, implement security controls, and collaborate with stakeholders to enhance overall security posture.

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.

Hands-on Network Engineer supporting a hybrid on-premises and cloud global infrastructure. Design, implement, maintain and troubleshoot LAN/WAN, firewalls, routing, VPNs, WiFi, and related security. Work on incidents, projects, change control, documentation, and provide escalation support across UK, Europe and Asia with close collaboration across infrastructure teams.

Hands-on network engineer supporting a hybrid on-premises and cloud global infrastructure. Design, implement, troubleshoot, upgrade and decommission network appliances/VMs; handle incidents, projects and change requests; collaborate with cloud, data centre and regional teams; maintain WAN, LAN/WiFi, firewall, VPN and security configurations; use ServiceNow and LogicMonitor; perform root cause and problem management to improve availability.

Lead and maintain on-site enterprise network infrastructure at Southampton Port. Monitor LAN/WAN/WLAN, datacenters and HA clusters; implement changes via change control; troubleshoot hardware/software, firewalls, VPNs and wireless; support service desk; develop documentation and contribute to network projects and DR processes.

The Network Engineer is responsible for supporting and optimizing BGP and IGP network operations, managing service operations, planning network improvements, and collaborating with global teams.

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.

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, maintain, and optimize HLR/HSS/UDM subscriber templates and roaming logic. Lead Full MVNO profile deployments, collaborate with roaming partners and system integrators, define HLR/HSS KPIs, and troubleshoot signalling using Wireshark and roaming platforms.

Design, implement, and operate Virtu’s global low-latency network. Build connectivity across venues, troubleshoot third-party links, and drive automation using configuration management and software collaboration. Improve scale, reliability, and performance while working with software engineers and stakeholders in a fast-paced trading environment.

Lead Network Engineer responsible for designing, implementing, and supporting global multi-cloud and on-premise network infrastructure. Lead SD-WAN, automation, wireless, security (firewalls, SSE/SASE), capacity planning, disaster recovery, and standards. Mentor engineers, consult stakeholders, and develop configuration standards, policies, and procedures to ensure secure, resilient networking across regions.

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.

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.

As a Deployment Engineer, you will design and deploy wired and wireless networks, make technical decisions, support installations, and ensure customer satisfaction during the network turn-up process.

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.

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.

Lead cloud network reliability and automation across AWS: design and maintain IaC (Terraform), CI/CD pipelines, load balancers, CloudFront and Cloud WAN, implement observability and governance, participate in incident rotation, and drive cross-functional infrastructure improvements.

Build and operate automated network monitoring, debugging, and repair tooling for a hyperscale datacenter fleet. Define realtime health metrics, ship alerting and dashboards, automate fault detection-to-RMA pipelines, and own network qualification, reliability, and scalability across sites and host-to-network layers.

Design, build, and operate automated network monitoring, debugging, and repair pipelines for a hyperscale datacenter fleet. Own fleet health, alerting, validation, and tooling from detection through RMA and return-to-service. Ship production network automation, support on-call incidents, and scale networks via aggressive automation and diagnostics.

As an Operations Reliability Engineer, you will maintain network reliability and performance, troubleshoot incidents, and support automation initiatives across network operations.