Sr. Network Test EngineerInabia Software & Consulting Inc. • Bellevue, Washington, United States
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Sr. Network Test Engineer
Inabia Software & Consulting Inc.
- Bellevue, Washington, United States
- Bellevue, Washington, United States
Über
Location: Onsite (5 days)
Employment Type: Full-Time / Contract
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.
- 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.
- 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.
- 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.
- 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.
- Develop detailed test plans, matrices, acceptance criteria, and traceability documentation.
- Produce executive-ready test reports with charts, logs, KPIs, defect summaries, and engineering recommendations.
- Collaborate with software, network, DevOps, and system engineering teams throughout design, integration, and release cycles.
- 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 a/b/g/n/ac/ax)
- Satellite communication architectures
- TCP/IP, routing, switching, VLANs, QoS, BGP/OSPF
- Proven track record of designing and owning complex test environments.
- 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.
Sprachkenntnisse
- English
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