Senior Network Test Engineer Jobs

Senior Network Test Engineer

Inabia Solutions & Consulting

Location:
United States, Bellevue, WA ▼
Redmond, WA

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Not provided

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Job Description:

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.

Job Responsibility:

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/VoWiFi, VoNR, handovers, fallback, and failover
Configure and test IPv4/IPv6 addressing, subnets, VLANs, DHCP, NAT, DNS, and routing behaviors
Validate VPN configurations (IPsec, SSL, WireGuard, 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 traceroute/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

Requirements:

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/VoWiFi, 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
Must be legally authorized to work in the United States without sponsorship

Nice to have:

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

Additional Information:

Job Posted:
December 09, 2025

Employment Type:

Fulltime

Work Type:

On-site work

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