Apply for this opportunity

This job application is on an outside website. Be sure to review the job posting there to verify it's the same.

Apply Offsite

Telecom Test Lead / IMS VoLTE Validation Engineer

Job

Spectraforce

Warrenville, IL (In Person)

Full-Time

Posted 2 weeks ago (Updated 1 week ago) • Actively hiring

Expires 7/25/2026

See Job Scorecard

Review key factors to help you decide if the role fits your goals.

How is this calculated?

Pay Growth

out of 5

Not enough data

Not enough info to score pay or growth

Job Security

out of 5

Not enough data

Calculating job security score...

Total Score

out of 100

Average of individual scores

Were these scores useful?

Skill Insights

Compare your current skills to what this opportunity needs—we'll show you what you already have and what could strengthen your application.

Job Description

Role:

Telecom Test Lead /

IMS VoLTE Validation Engineer Duration:

04 Months - possible extension

Location:

Warrenville, IL - Fully onsite Looking for a test lead engineer that has 6-8 years' experience

SIP, IMS

Core, VoLTE/CVoIP call flow process for testing and validation.

Following skills/experience required:

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 on any language like 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