Sr. Network Test Engineer

Bellevue, WA

Full Time

Experienced

Senior Network Test Engineer

Company: 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.
Collaborate with software, network, DevOps, and system engineering teams throughout design, integration, and release cycles.

Required Qualifications

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
Proven track record of designing and owning complex test environments.

Preferred Skills

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.

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