Top Network Engineer Jobs in London

Build and extend high-scale egress-path systems running on Linux kernel and network dataplanes. Work on kernel network stack (eBPF), routing (BGP), and distributed systems to optimize packet flow, reliability, and performance. Collaborate across teams and participate in on-call rotation.

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, 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.

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.

Provide day-to-day incident and change support for enterprise network infrastructure in a regulated financial-services environment. Design, document, build, transition, configure, and support production, non-production, and disaster-recovery networks. Work across Cisco routing and switching, ACI, Meraki, Check Point firewalls, F5 load balancing, DNS, DHCP, SDN, automation, Infrastructure-as-Code, observability, and secure internet-facing services.

Provides enterprise network engineering and operations for a regulated UK financial-services environment. Responsibilities include incident and change support, network design, documentation, installation, configuration, live transition, and ongoing support across production, non-production, and disaster-recovery infrastructure. The role requires hands-on expertise with Cisco, ACI, Meraki, Check Point, F5, LAN/WAN, DNS, DHCP, network security, automation, Infrastructure-as-Code, and observability.

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.

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.

Lead the design, implementation, operation, and enhancement of large-scale network infrastructure across data centers, enterprise environments, containers, and public clouds. Drive automation, DevOps practices, reliability, security, performance, documentation, and incident response. Collaborate with development and business teams on enterprise initiatives while mentoring network engineers and serving as a technical lead for network standardization and infrastructure improvements.

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.

Provide pre-sales technical support to UK public sector customers, partnering with account managers to identify needs and design data center, routing, campus, and security solutions. Lead architectural sessions, product presentations, proofs of concept, deployments, RFP/RFQ responses, feature requests, and customer feedback. Represent the company at events and author technical content while maintaining expertise in networking technologies and competitor solutions.

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.

Own firewall policy management and network security operations across regulated enterprise environments. Administer AlgoSec to automate policy governance, risk analysis, access recertification, change governance, and compliance reporting. Manage multi-vendor firewalls, optimize rules, support incidents and exceptions, and build automation using scripting and configuration-management tools. Advise technical and executive stakeholders on security posture, resilience, regulatory obligations, and business needs.

Design, secure and standardise OT network architecture for global BESS projects. Act as design authority, produce technical specifications, lead transformation, govern MSPs, ensure IT/OT segmentation and CNI compliance, and support project delivery and operational escalation.

Manage, support and enhance global network infrastructure across on-premises, colocation and cloud. Design and build network products, maintain network security (next-gen firewalls), implement BAU changes, develop IaC and SRE-driven network automation, support cloud networking (Azure/AWS), run data centre operations and manage third-party vendors.

Optimize and deploy neural-network control policies for humanoid robots: profile and remove inference bottlenecks, port models to new hardware, implement custom kernels, quantize models with minimal quality loss, and propose architecture changes to improve latency and memory usage.

Design, implement, troubleshoot, and operate enterprise IoT network solutions. Responsibilities include onboarding devices through Cisco DNA Center, isolating and securing IoT traffic, integrating sensors and actuators, testing solutions, scaling network infrastructure, and documenting architectures and procedures. The role requires production experience with Cisco SD Access, DNAC, and VxLAN, plus IoT protocols, programming, cloud IoT platforms, security practices, and hardware integration.

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.

Designs, implements, secures, and maintains global network and infrastructure environments across international offices. Responsibilities include Azure networking, Check Point SASE, Aruba switching and wireless, Windows Server, Hyper-V, Active Directory, Veeam backups, monitoring, patching, vulnerability remediation, troubleshooting, project delivery, and external vendor coordination. Provides second- and third-level support while contributing to infrastructure modernization and operational stability.

Manage and maintain QRT's network infrastructure and automations. Responsibilities include incident resolution, developing monitoring tools, and supporting network automation.

Design, deploy, and operate Hack The Box’s global, multi-site data center network. Responsibilities include BGP, EVPN-VXLAN, JunOS and Juniper platform management, network automation, monitoring and observability, capacity planning, site expansions, troubleshooting, documentation, and on-call incident response. The role collaborates with systems, platform, SRE, security, and product engineering teams supporting VMware, Kubernetes, and Ceph environments.

The Senior Network Engineer will manage and scale network infrastructure, enhance workflows through AI and automation, and document solutions for improved efficiency.

Maintains, supports, enhances, and leads the lifecycle management of critical IP network infrastructure. Responsibilities include fault resolution, planned maintenance, network upgrades, project delivery, service transition, testing, documentation, supplier supervision, network design updates, continuous improvement, and technical mentoring. The role requires expertise in complex always-on networks, routing protocols, MPLS, multicast, Cisco platforms, QoS, data center technologies, security devices, AWS, and automation.