Sr. Wireless Network Test Engineer

Munich, Germany
Full Time
Experienced
Senior Wireless Network Test Engineer (Munich, Germany)
Location: Munich, Germany (Onsite)
Employment Type: Full-time
Work Authorization: Candidates must have the legal right to work in Germany (EU citizen or valid German/EU work permit)
Position Overview
Inabia is expanding its telecom engineering presence in Europe and is seeking an experienced Senior LTE/5G Network Test Engineer to support advanced mobile network testing for a telecommunications client in Munich. This role requires strong hands-on experience across 4G/LTE, 5G NR, RAN, Core (EPC/5GC), and IMS/VoLTE, along with expert knowledge of test tools and log analysis.
The ideal candidate brings deep technical understanding of 3GPP standards and can execute end-to-end testing in both lab and field environments.
Key Responsibilities
1. LTE / 5G NR Network & Protocol Testing
  • Execute full lifecycle testing: attach, registration, bearer setup, PDU sessions, VoLTE/VoNR call flows
  • Validate handover (HO), data performance, throughput, latency, jitter, packet loss
  • Conduct KPI evaluations and troubleshoot performance degradations
2. RAN, Core & IMS Troubleshooting
  • Debug issues across gNB/eNB, EPC/5GC (MME, AMF, SMF, UPF), and IMS components
  • Analyze protocol behavior across RRC, NAS, SIP, RTP, Diameter
  • Collaborate with vendor engineering teams, device OEMs, and operators
3. Test Environment Ownership
  • Build/manage test beds including UEs, SIM configurations, APNs, gNB/eNB parameters
  • Integrate and maintain testing frameworks and network simulators (Keysight/IXIA/Spirent)
  • Ensure environment stability for regression, performance, and interoperability tests
4. Tools & Log Analysis
Use advanced telecom tools including:
  • QXDM / QCAT / QTRACE
  • Wireshark / tcpdump
  • Keysight/IXIA, Spirent, Anritsu
  • TEMS, X-Cal, Rohde & Schwarz tools
Interpret logs to diagnose failures and produce clear RCA documentation.
5. Reporting & Collaboration
  • Create detailed test cases, test plans, KPI dashboards, and defect reports
  • Work closely with cross-functional engineering teams in Germany and internationally
  • Provide technical input during planning, integration, and software release cycles
Required Qualifications
  • 5+ years’ experience in LTE/5G network testing or mobile device/network validation
  • Strong experience with VoLTE/IMS, RRC/NAS debugging, and core network interactions
  • Hands-on proficiency with telecom test tools (QXDM, QCAT, Wireshark, TEMS, X-Cal, Keysight/IXIA)
  • Excellent understanding of 3GPP standards for LTE and 5G
  • Ability to conduct structured testing in both lab and field environments
  • Ability to work onsite in Munich
  • Legally authorized to work in Germany (EU citizenship, Blue Card, or valid German work permit)
Preferred Qualifications
  • Experience with European mobile operators (e.g., Deutsche Telekom, Vodafone, Telefónica/O2)
  • OEM device testing (Samsung, Google, Motorola, Xiaomi, etc.)
  • Familiarity with private 5G, CBRS-like shared spectrum, or enterprise 5G deployments
  • Experience with KPI automation, scripting, or CI/CD testing frameworks

 
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