What are the responsibilities and job description for the Sr. Network Test Engineer - Cellular, WiFi & Broadband position at Inabia Software & Consulting Inc.?
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.
Position Overview
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.
Key Responsibilities
Cellular / WiFi / Broadband Testing
- 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.
- 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.
- 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.
Salary : $55 - $65