Top Network Engineer Jobs in Belfast

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.

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.

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.

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.

An eight-week remote internship providing hands-on training in network security. Interns will monitor traffic, configure firewalls and VPNs, harden operating systems, manage patches, conduct vulnerability assessments and penetration tests, test wireless security, and apply network segmentation and cryptography. Participants use tools including Wireshark, tcpdump, Nmap, pfSense, and Cisco Packet Tracer, then complete a final presentation and assessment.

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.

Contract Data Centre Network Engineer to design, deploy, and operate high-performance data centre networks (leaf-spine, EVPN/VXLAN), manage routing (BGP/OSPF), automate configurations (Python/Ansible/Terraform), troubleshoot network and Linux systems, support Kubernetes networking, and contribute to monitoring, documentation, and capacity planning for AI/GPU infrastructure.

The Senior Network Engineer will support Exegy's network infrastructure, including administration, device maintenance, and collaboration with vendors for troubleshooting and changes.

As a NOC Engineer, you will ensure network stability by monitoring, troubleshooting, and resolving incidents in a critical operational environment, while adhering to SLAs.

Design, configure, and maintain secure, scalable enterprise networks; administer Citrix NetScaler VPX; develop Ansible playbooks for automation; monitor and troubleshoot LAN/WAN/cloud networking, L4-L7 traffic, and routing (BGP/OSPF/VXLAN); document configurations and support infrastructure projects.

Drive developer growth by building the developer community and establishing an early-stage go-to-market motion for AI agent technology. Collaborate with an experienced global team in a remote-first environment to promote developer-focused products and customer impact.

The Senior Network Automation Engineer will enhance Perl code for network automation, maintain REST APIs, reduce technical debt, and support junior engineers.

Design, implement, monitor, and support WAN/LAN/wireless and firewall infrastructure. Deliver network projects, manage incidents, perform root-cause analysis, coordinate with ISPs/vendors, produce documentation, and support security and continuous improvement.