Sr. Network Test Engineer - Cellular, WiFi & Broadband

Senior Network Test Engineer

Location: Onsite (5 days/week)
Type: Full-time, W-2
Work Authorization: Must be legally authorized to work in the United States without sponsorship.

Inabia is seeking a highly skilled Senior Network Test Engineer with deep hands-on experience validating cellular (LTE/5G), WiFi, broadband, and enterprise IP networking systems. This role demands strong technical rigor across RF, IP layers, protocol analysis, broadband connectivity, VPN setup, routing, and end-to-end network performance validation. You will own test planning, test environment configuration, field/lab validation, KPI measurement, and L2–L7 troubleshooting for advanced telecommunications and enterprise-grade network systems.

• Conduct comprehensive testing across LTE, LTE-A, 5G NSA/SA, WiFi 5/6/6E, and residential/enterprise broadband access technologies.
• Validate throughput, latency, jitter, packet loss, QoE, and service continuity across fixed and mobile access.
• Test and evaluate broadband gateways, CPEs, modems, routers, mesh systems, and indoor coverage solutions.
• Perform multi-RAT test scenarios: attach, registration, CA, EN-DC, VoLTE/Vo Wi Fi , VoNR, handovers, fallback, and failover.

• Configure and test IPv4/IPv6 addressing, subnets, VLANs, DHCP, NAT, DNS, and routing behaviors.
• Validate VPN configurations (IPsec, SSL, Wire Guard, OpenVPN) including tunnel setup, failover, and throughput impacts.
• Execute test cases involving LAN/WAN routing, QoS, firewall rules, port forwarding, and enterprise-grade security controls.
• Analyze L2–L7 network behavior using tcpdump, Wireshark, iPerf, TR-069/USP, SNMP, syslogs, IP routing tables, and trace route/pathping.

• Build and maintain multi-node testbeds including 5G CPEs, WiFi APs, broadband gateways, SIM configs, VPN endpoints, and core network simulators.
• Integrate various network elements (UEs, routers, switches, servers) and configure network services to replicate real enterprise and residential environments.
• Automate test workflows where possible and ensure testbed version control, repeatability, and documentation.

• Use tools such as QXDM/QCAT, Wireshark, tcpdump, TEMS, X-Cal, Actix, iPerf, spectrum analyzers to capture and interpret logs.
• Perform advanced log analysis for RRC, NAS, SIP, RTP/RTCP, and IP-layer events to diagnose root causes across RF and IP tech stacks.
• Investigate throughput bottlenecks, packet loss patterns, IP routing anomalies, DNS failures, and misconfiguration issues.

• Produce clear and actionable test plans, test cases, KPI dashboards, defect logs, and RCA reports.
• Work closely with device OEMs, carrier engineering teams, broadband vendors, and enterprise networking teams.
• Provide engineering feedback for firmware updates, feature improvements, certification cycles, and customer escalation scenarios.

• 5+ years in telecom or advanced network testing (LTE/5G/WiFi/broadband).
• Strong knowledge of IPv4/IPv6, subnetting, routing, VLANs, DHCP, DNS, NAT, VPNs, and enterprise network configuration.
• Hands‑on experience with broadband gateways, home routers, WiFi APs, 5G/LTE CPEs, or ISP‑grade network equipment.
• Proficiency in QXDM, QCAT, Wireshark, tcpdump, iPerf, TEMS, X‑Cal, or similar tools.
• Experience testing VoLTE/Vo Wi Fi , IMS, SIP/RTP traffic, mobility, call flows, and service continuity.
• Proven ability to build, manage, and debug complex test environments.
• Strong documentation, troubleshooting, and communication skills.

• Experience with carrier broadband deployments, ISP labs, DOCSIS/Fiber, or DSL/Copper access.
• Familiarity with firewall rules, routing tables, ACLs, QoS policies, and enterprise networking best practices.
• Exposure to Python, automation frameworks, or log-parsing scripts.
• Experience working with U.S. carriers, broadband ISPs, or network equipment vendors.