IMS Network Test Engineer

3 weeks ago

Bellevue, United States American Unit, Inc Full time

IMS Network Test Engineer

6+ Months Contract

Bellevue, WA


Customer: T-Mobile


Job Description

IMS Network Test Engineer: This project focuses on migrating Voice over LTE (VoLTE) services to new hardware platforms while maintaining the existing IMS-based software application. The role requires an experienced IMS Network Engineer with a strong background in QA and Test Validation to conduct comprehensive testing of VoLTE services within the IP Multimedia Subsystem (IMS) framework. The ideal candidate should possess in-depth knowledge of IMS architecture, VoLTE call flows, SIP signaling, and proficiency in specialized IMS testing tools and methodologies. This is going to be a long-term contract, located in either Bellevue, WA, or Leawood, KS.


IMS Network Test Engineer Requirements:

  • 5+ years of Mavenir IMS Core Network Platform Experience (if minimal IMS specifically, must be strong in Nokia background – must be version 1 or 1.5)
  • Must have TAS, I/S-CSCF, and BGCF within IMS Solutions
  • Experience validating IMS E2E call flows.
  • This is critical for the QA/Test Validation aspect of the role, ensuring end-to-end functionality of VoLTE calls.
  • Strong knowledge of TCP/IP networking, TCP, UDP, SCTP, and HTTP.
  • Must have the VoLTE experience within the network (Voice over LTE Network)
  • Interfaces: Sh, Cx, H.248, SIGTRAN
  • Protocols: SIP, DIAMETER, HTTP, SS7, MAP
  • Familiarity with UNIX, LINUX, Kubernetes, virtualization, and Cloud Native.
  • Knowledge of protocol analysis, Wireshark, Netscout, tcpdump:
  • These tools are essential for debugging and analyzing VoLTE call flows and network traffic, which is a key part of QA and test validation.

Nice to Have Skills:

  • Experience with testing and troubleshooting on the Mavenir IMS TAS, CSCF, and BGCF


IMS Network Test Engineer Responsibilities:

  • Support E2E validation of IMS solution, TAS, I/S-CSCF, and BGCF software releases, and features.
  • Support IMS core Lab issue diagnoses, troubleshooting, and resolution
  • Design and execute rigorous test plans for regression, performance, and end-to-end validation of VoLTE calls in the IMS environment.
  • Manage increased testing frequency due to platform updates, maintain consistent performance metrics, and optimize test procedures for IMS-based VoLTE services.
  • Ensure seamless functionality, optimal voice quality, and adherence to IMS protocols across various platform changes

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