LTE 5G Tester
Reqroute, Inc
Job Summary We are seeking an experienced Test Engineer with strong expertise in IMS Core, SIP, VoLTE/CVoIP call flows, and telecom network testing . The ideal candidate will have 6–8 years of hands‑on experience in validating and troubleshooting IMS/VoLTE networks, analyzing signaling protocols, and performing end‑to‑end call flow testing in LTE and 5G environments. Required Skills & Experience 6–8 years of experience in Telecom Testing, IMS Core, SIP, and VoLTE/CVoIP environments. Strong knowledge of 5G, LTE, and UMTS technologies. Hands‑on experience with VoLTE/IMS Call Processing and Supplementary Services . Expertise in VoLTE/IMS Network Performance & Capacity Testing and IMS Node Benchmarking. Strong understanding of SIP‑based VoIP/IMS Call Flows , including Voice and Supplementary Services. Experience analyzing signaling protocols using Iris Analyzer and RADCOM . Hands‑on experience with IMS interworking entities such as: BGCF, MGCF, MRFC, MRFP, AGW, IBCF, TrGW Experience with LTE Core interfaces and protocols including: S1-MME, S1-U, S6a, S11, S5/S8, Rx, NAS, S1-AP, RRC GTPv2-C, GTP-U, SGs-AP, Gn, Gx, Ga, Sy In‑depth knowledge of Telecom protocols and technologies SIP, RTP, Diameter, DNS, H.248, IPSec, TCP/IP, LDAP, IPv4 / IPv6 GTPv2 Strong troubleshooting and Root Cause Analysis (RCA) skills for VoLTE end‑to‑end call flows. Experience with IP network design, planning, and optimization. Scripting experience using Python, Unix Shell, Selenium , or similar technologies. Hands‑on experience with Android ADB commands for automation and device log collection. Tools Experience Experience with one or more of the following tools: Wireshark, QXDM, RADCOM, IXIA, EXPO, LANDSLIDE Iris Analyzer Top 3 Required Skills IMS / VoLTE Call Flow Analysis and Testing Telecom Protocols (SIP, RTP, Diameter, GTPv2, H.248, DNS, TCP/IP, IPv4/IPv6) IMS Interworking Entities (BGCF, MGCF, MRFC, MRFP, AGW, IBCF, TrGW) and Related Interfaces Note: This position requires onsite presence in Warrenville, IL. Candidates with strong telecom testing and IMS/VoLTE troubleshooting experience will be given preference. #J-18808-Ljbffr Reqroute, Inc
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