Senior Network Test Engineer Jobs

Inabia Solutions & Consulting

Location:
Germany, Munich

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 to support advanced testing across 5G/LTE, WiFi, and broadband/IP networking environments for a telecommunications client in Munich. This position combines wireless test engineering with enterprise and broadband networking skills, requiring hands-on experience validating radio, IP networking, and CPE/gateway performance in both lab and field conditions.

Job Responsibility:

Perform end-to-end testing for LTE, LTE-A, 5G NSA/SA, and WiFi 5/6/6E
Validate attach/registration, CA, EN-DC, VoLTE/VoWiFi, VoNR, handovers, fallback, and mobility scenarios
Conduct throughput, latency, jitter, and packet-loss testing using standardized benchmarking methods
Analyze RAN KPIs and troubleshoot coverage, mobility, capacity, and interference issues
Test residential and enterprise broadband devices including routers, gateways, mesh WiFi systems, CPEs, modems, and home networking equipment
Execute performance, reliability, and stability tests on broadband/WAN connectivity (fiber, DSL, wireless broadband, Ethernet backhaul)
Validate LAN/WAN configuration workflows, device onboarding, and end-to-end connectivity
Configure and test IPv4/IPv6 addressing, subnetting, VLANs, DHCP, DNS, NAT, port forwarding, and firewall rules
Validate VPN tunnel setup and performance (IPsec, SSL, WireGuard, OpenVPN)
Troubleshoot routing, DNS resolution issues, gateway conflicts, and Layer 2/Layer 3 connectivity
Use diagnostic tools such as Wireshark, tcpdump, traceroute, iPerf, and system logs for L2–L7 debugging
Build and maintain lab environments combining 5G/LTE devices, broadband routers, switches, servers, VPN endpoints, and test automation tools
Ensure test repeatability through proper documentation, version control, and environmental consistency
Integrate new firmware, OS builds, APNs, SIM profiles, and network parameters for testing cycles
Use tools such as TEMS, X-Cal, Actix, QXDM/QCAT, Wireshark, tcpdump, iPerf, spectrum analyzers, and vendor-specific utilities
Perform advanced log analysis of RRC, NAS, SIP, RTP/RTCP, and system logs to identify root causes across wireless & IP layers
Validate compliance with KPI requirements, feature acceptance criteria, and field performance goals
Develop clear test plans, defect reports, KPI dashboards, and RCA summaries
Collaborate with RAN engineering teams, broadband development teams, device OEMs, and network operators
Provide input for feature validation, firmware improvements, and field issue reproduction

Requirements:

Experience in LTE/5G and/or WiFi network testing, broadband CPE testing, or IP networking validation
Strong understanding of IP networking principles (subnetting, routing, VLANs, NAT, firewall rules, DHCP, DNS)
Hands-on experience with test tools (e.g., Wireshark, iPerf, tcpdump, TEMS, X-Cal, Actix, QXDM)
Able to build, configure, and troubleshoot complex testbeds across wireless and IP domains
Strong analytical and troubleshooting skills across RF, IP, and application layers
Excellent documentation and communication skills
Must possess the legal right to work in Germany (e.g., EU citizen, German work permit, EU Blue Card)

Nice to have:

Experience with German or EU mobile operators (Telekom, Vodafone, O2, 1&1) or broadband ISPs
Experience testing home networking devices, broadband gateways, WiFi APs, or mesh systems
Familiarity with enterprise-grade networking (Cisco, Juniper, Aruba, Fortinet, Ubiquiti)
Knowledge of VoLTE/IMS/SIP analysis or VoWiFi/VoNR testing
Python or automation scripting experience

Additional Information:

Job Posted:
December 09, 2025

Employment Type:

Fulltime

Work Type:

On-site work

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Senior Network Test Engineer