Top Network Engineer Jobs in London

Leads enterprise proxy, perimeter, and SSE/SASE security engineering across US operations. Designs and operates Zero Trust, identity-aware proxy, secure gateway, egress, segmentation, and cloud interconnect architectures. Owns roadmap execution, governance, remediation, lifecycle modernization, incident management, observability, and resiliency. Supervises engineers, establishes reusable security patterns, coordinates cross-functional delivery, and promotes secure, responsible AI-assisted engineering practices.

Provides technical support and guidance to game developers and publishers using PlayStation network services, APIs, tools, and technologies. Investigates and escalates technical issues, collaborates with internal and regional teams, gathers partner feedback, improves developer-facing tools and documentation, automates workflows, and delivers technical training and presentations.

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.

Design, build, automate, and operate cloud-native network infrastructure to ensure reliability, performance, and observability. Drive test-driven infrastructure changes, support office networking, participate in on-call rotations, incident escalations, code/config reviews, and produce documentation and playbooks for the engineering organization.

Deliver live incident containment and recovery, security assessments, hardening, and managed security solution implementations for clients. Review and secure cloud, identity, firewall, endpoint, and network environments; design Zero Trust, SASE, segmentation, conditional access, and DLP solutions; preserve evidence and support forensic teams; and produce security architecture, deployment, and operational documentation.

Leads requirements capture, telecom tendering, and end-to-end network connectivity solution design across EMEA. Develops resilient architectures, high- and low-level designs, network diagrams, and governance documentation. Evaluates vendors, manages supplier performance and SLAs, embeds operational risk controls, and supports regional network strategy. Partners with business stakeholders, engineering teams, sourcing groups, and telecom providers while mentoring engineers and evaluating emerging connectivity technologies.

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.

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 and operate Internet-scale systems terminating HTTP and TLS, migrate infrastructure from NGINX to a Rust-based proxy, improve protocol performance, and contribute to open-source projects and industry standards. The role involves complex systems programming, reliable and secure software development, and collaboration with leading networking engineers.

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.

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.

Design, implement, operate, and troubleshoot CrowdStrike’s global multi-vendor, multi-cloud, hybrid data center networks. Build cloud connectivity and network constructs, develop infrastructure-as-code and automation using Ansible, Terraform, Python, and Go, improve resilience and deployment efficiency, support incident analysis and on-call rotations, and ensure compliance with regional data sovereignty and security requirements.

Monitor autonomous satellite laser ranging stations, triage faults, coordinate fixes with field engineers and host sites, and maintain reliable network operations. Build dashboards, alerting, and runbooks; track network performance; report results to internal teams and customers; support tracking schedule planning; and help develop on-call coverage as the global station network expands.

Architect, engineer, and oversee delivery of complex corporate, colocation, and ultra-low-latency trading networks. Responsibilities include lifecycle management of switching, firewalls, load balancers, telemetry, CMDB, and automation platforms; designing software-driven network solutions; managing WAN traffic prioritization and steering; collaborating with project teams and vendors; and maintaining expertise in emerging networking technologies.

Architects, designs, manages, and supports enterprise network, telecommunications, video, and infrastructure systems. Responsibilities include network architecture, firewalls, routing, switching, wireless, load balancing, security, disaster recovery, vendor management, troubleshooting, infrastructure projects, compliance, third-level support, documentation, and technical training. The role also performs rotational on-call duties and serves as the network team’s highest technical resource.

Provides deep technical leadership for QRT’s global trading and enterprise networks. Leads complex investigations involving performance, latency, resilience, and operations; serves as a senior escalation point; translates architecture standards into automation, validation, documentation, and runbooks; supports migrations and technical improvements; evaluates technologies; develops instrumentation; and mentors network engineers.

Leads end-to-end network verification and performance testing across cellular, WiFi, broadband, IP, and AWS-connected environments. Configures testbeds, executes functional, regression, interoperability, resiliency, and performance tests, analyzes traffic and logs, troubleshoots Layer 2–7 issues, performs root-cause analysis, and documents defects and test results. Develops automation using Python or Bash and integrates network verification into CI/CD workflows while collaborating with engineering, DevOps, infrastructure, and network operations teams.

Own the reliability, performance, resilience, observability, automation, and security of enterprise network infrastructure. Design and maintain Cisco and Arista datacenter networks, support WAN connectivity, automate operations with Python and Ansible, extend infrastructure-as-code and CI/CD practices, and lead incident response, on-call operations, postmortems, and root-cause analysis for complex network issues.

Own the reliability, performance, availability, and security of a hybrid enterprise network across Azure, remote access, load balancing, and branch connectivity. Serve as a senior escalation point for complex incidents, design Azure networking solutions, modernize and automate network services, implement monitoring and Infrastructure as Code, and collaborate with Cloud, Security, and Engineering teams. Mentor engineers and support resilient production environments.

Provides Level-1 triage and first-line support for network and security infrastructure. Responsibilities include handling service tickets, troubleshooting incidents, escalating issues according to SLAs, communicating with customers and internet service providers, supporting change requests, documenting technical procedures, and working flexible shifts. The role involves exposure to routing, switching, SD-WAN, firewalls, monitoring, DNS, DHCP, and ITSM platforms.

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.

Provide advanced out-of-hours support for customer network and security environments. Troubleshoot SD-WAN, firewall, routing, switching, ISP, and security incidents; handle P1/P2 emergencies; implement changes and project tasks; perform upgrades and hardware replacements; manage ISP circuits; and maintain technical documentation. The role is remote, UK-based, and requires night-shift work with independent customer support and incident resolution.

Build, extend, and operate systems that provision, monitor, and orchestrate private network interconnects at scale. Design, implement, test, and deploy software; collaborate with Product, Network, and Infrastructure teams; participate in on-call rotations and maintain production health. Work with systems-level languages and network technologies (BGP, routing, overlays) across distributed services.

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.

Own the network layer of physical data-centre deployments, including on-site switch and firewall installation and configuration, carrier and fibre circuit activation, and external operator relationships. Serve as the primary on-site contact for network contractors and providers, coordinating closely with deployment and data-centre operations teams to bring sites into production.