Senior Network Test Engineer

Role overview

Testing and network responsibilities

• Plan and execute verification across telecom, broadband, WiFi, and IP-based networks.
• Perform functional, integration, regression, interoperability, performance, stability, and end-to-end testing.
• Measure throughput, latency, jitter, packet loss, availability, failover, and service continuity.
• Configure and troubleshoot IPv4/IPv6, subnetting, VLANs, DHCP, DNS, NAT, routing, VPNs, firewalls, and LAN/WAN connectivity.
• Configure routers, switches, access points, gateways, VPN endpoints, servers, and test clients.
• Test broadband and WiFi gateways, routers, CPE devices, and access points.
• Support LTE/4G and 5G tests involving mobility, handovers, registration, throughput, and service performance.
• Capture and analyze traffic with Wireshark, tcpdump, iPerf, and related tools.
• Troubleshoot Layer 2–7 issues across configuration, transport, routing, applications, cloud services, and infrastructure.
• Build and maintain repeatable network test environments and testbeds.

Automation, verification, and reporting

• Create test strategies, test plans, test cases, verification procedures, defect reports, root-cause documentation, and final reports.
• Work with engineering, development, network operations, DevOps, and infrastructure teams to reproduce and resolve defects.
• Test network services and applications in AWS and validate hybrid on-premises-to-AWS connectivity.
• Analyze cloud-connected connectivity, latency, routing, DNS, firewall, and access-control issues.
• Work in CI/CD-driven test environments and use Python, Bash, or similar scripting for execution, log processing, configuration, and automation.
• Translate requirements into measurable test cases, acceptance criteria, and performance benchmarks.
• Execute positive, negative, boundary, failover, resiliency, and performance tests.
• Verify network configuration, firmware, software, and infrastructure changes before production; perform regression testing.
• Document defects with logs, packet captures, reproduction steps, and technical evidence; track them through investigation, retesting, and closure.

Key qualifications

• At least five years of network testing, verification, telecommunications testing, or network engineering experience.
• Strong TCP/IP and Layer 2/Layer 3 networking knowledge.
• Hands-on IPv4/IPv6, subnetting, VLANs, routing, DHCP, DNS, NAT, VPN, and firewall experience.
• Network performance testing experience, including throughput, latency, jitter, and packet-loss analysis.
• Strong Wireshark and packet-level troubleshooting experience.
• Experience building and maintaining network test environments and testbeds.
• Experience developing and executing test plans, test cases, regression tests, and verification procedures.
• Structured root-cause analysis across network, infrastructure, and application layers; strong technical reporting and documentation skills.
• Must have the legal right to work in the United Kingdom.

Preferred qualifications

• LTE/5G, WiFi, broadband, CPE, or telecommunications network testing experience.
• AWS networking experience with VPCs, subnets, security groups, route tables, VPNs, and load balancers.
• DevOps or CI/CD experience, including Git, Jenkins, GitLab CI, or Azure DevOps.
• Python or Bash scripting; Docker or Kubernetes exposure.
• Experience with iPerf, tcpdump, traceroute, ping, Nmap, SNMP, syslog, network monitoring, or traffic-generation tools.
• Telecom test platforms such as QXDM/QCAT, TEMS, XCAL, Actix, Keysight, or Spirent.
• Familiarity with VoIP, SIP, RTP, IMS, VoLTE, or VoWiFi.
• Experience in telecom operators, ISPs, network equipment vendors, or enterprise network environments.