Test lead Engineer
Listed on 2026-07-04
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Engineering
Systems Engineer, Telecoms Engineering, Wireless / 5G, Test Engineer
Test Engineer
Location:
onsite. Warrenville, IL.
Strong knowledge in 5G/LTE/UMTS, VoLTE/IMS Network Performance and Capacity Test and IMS Nodes Performance Benchmarking Activities.
Extensive Hands on experience with VoLTE/IMS Call Processing and VoLTE/IMS Supplementary Services.
Need to have hands on experience IMS Related Protocols Signaling Analyzing (VoLTE/IMS, VOIP Call Flows (SIP/SDP/H.248 etc.) using Iris Analyzer and RADCOM).
Working experience on IMS interworking entities (BGCF, MGCF, MRFC, MRFP, AGW, IBCF, TrGW) and interfaces.
VOIP / IMS call flows (expertise in SIP based call flows) - Voice and Supplementary Services.
Experience with LTE core system interfaces and protocols such as S1-MME, S1-U, S6a, S11, S5/S8, Rx, NAS, S1-AP, RRC, GTPv2c, GTP-U, SGs-AP, Gn, Gx, Ga, Sy is desired.
In-depth understanding of Telecom Protocols and technologies like GTPV2, SIP, RTP, IPv4 and IPv6, DIAMETER, DNS, H.248, IPSec, TCP-IP, LDAP, etc.
Design & Troubleshooting experience in VoLTE E2E Call Flows and RCA Debugging Skills and IP Network design, planning and optimization.
Scripting experience in any language such as Python, Unix, Selenium and hands on experience on Android adb command for automation and taking device logs.
Tool Experience on Wireshark, QXDM, RADCOM, IXIA, EXPO, LANDSLIDE, etc.
Top Skills- IMS call flows
- Telecom Protocols and technologies like GTPV2, SIP, RTP, IPv4 and IPv6, DIAMETER, DNS, H.248, IPSec, TCP-IP, LDAP, etc.
- IMS interworking entities (BGCF, MGCF, MRFC, MRFP, AGW, IBCF, TrGW) and interfaces
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