Sr. Network Test Engineer
5 days ago
Bellevue
Job DescriptionSenior Network Test EngineerCompany: Inabia Solutions & Consulting Location: Onsite (5 days) Employment Type: Full-Time /W-2 or GC ONLY Position Overview Inabia is seeking a highly accomplished Senior Network Tester with deep expertise across telephony systems, cellular/WiFi networks, and satellite communication environments. This onsite role demands a hands-on engineer who can own the test lifecycle end-to-end—designing enterprise-grade test environments, benchmarking, validating complex communication protocols, and delivering precise analysis that ensures the reliability of mission-critical networks. The ideal candidate brings strong technical leadership, advanced troubleshooting intuition, and the ability to translate test outcomes into actionable engineering insights. Key Responsibilities 1. Advanced Cellular & WiFi Network Testing • Conduct comprehensive performance and functional testing across 4G, LTE, 5G NR, and WiFi (2.4/5 GHz, WiFi 6/6E) networks., • Validate eNB/gNB connectivity, handovers, roaming behaviors, and throughput stability under varying load conditions., • Analyze RF signal strength, SINR, RSSI, SNR, channel utilization, and interference patterns using industry-grade tools., • Benchmark performance across mobility scenarios, high-density environments, and mixed traffic types. 2. Telephony Protocol & VoIP Validation • Validate call flows, signaling, and control-plane behavior across SIP, RTP, RTCP, IMS, SS7, and VoIP systems., • Analyze codec behavior (G.711, G.722, Opus, AMR), MOS scoring, jitter buffers, and packet-loss tolerance thresholds., • Perform regression testing on dial plans, call routing, failover, QoS tagging, and multi-site telephony environments., • Ensure alignment with ITU-T, 3GPP, and IETF standards. 3. Satellite Link Analysis & Testing • Execute end-to-end testing of satellite uplink/downlink paths, modulations, link budgets, rain fade tolerance, and latency performance., • Evaluate communication reliability under varying atmospheric conditions and bandwidth constraints., • Validate ground station integration, antenna alignment parameters, and satellite modem behavior., • Use link simulators, channel emulators, and traffic generators for controlled analysis. 4. Enterprise-Grade Test Environment Ownership • Architect, configure, and maintain a fully instrumented test environment including routers, switches, firewalls, VoIP gateways, traffic generators, RF analyzers, satellite modems, and WiFi/cellular test benches., • Ensure environment readiness for functional, performance, regression, and stress tests across multiple domains., • Manage firmware updates, scenario modeling, lab automation, and continuous integration with engineering teams. 5. Deep-Dive Troubleshooting & Performance Benchmarking • Perform advanced troubleshooting across OSI layers using Wireshark, tcpdump, SolarWinds, iPerf, NetSpot, Nmap, Aircrack-NG, and similar tools., • Analyze throughput, latency, jitter, packet loss, QoS behaviors, and end-to-end application performance., • Correlate anomalies with protocol-level failures, RF constraints, routing issues, or misconfigurations., • Produce clear root-cause analysis and optimization recommendations for engineering leadership. 6. Reporting, Documentation & Cross-Team Collaboration • Develop detailed test plans, matrices, acceptance criteria, and traceability documentation., • Produce executive-ready test reports with charts, logs, KPIs, defect summaries, and engineering recommendations., • 5+ years of professional experience in network testing across telephony, cellular, WiFi, and satellite environments., • Mastery of network diagnostic tools: Wireshark, tcpdump, iPerf, SolarWinds, traffic generators, protocol analyzers, RF scanners, and monitoring dashboards., • Strong understanding of:, • SIP/RTP/IMS/VoIP protocols, • LTE/5G NR fundamentals, • WiFi standards (802.11a/b/g/n/ac/ax), • Satellite communication architectures, • TCP/IP, routing, switching, VLANs, QoS, BGP/OSPF, • Background in large-scale telecom or satellite network deployments., • Experience with RF test equipment, network automation frameworks, or CI/CD-driven testing., • Strong analytical ability, structured communication, and stakeholder engagement skills. Powered by JazzHR KYuSn3vvgv