Title: IMS Cloud Network Test/LAB Engineer
Location: Seattle, WA
Duration: 6 Months
Job Description:
The IMS Systems Lab Test engineer will primarily work on testing and validating IMS Network Applications on the T-Mobile Private Cloud Platform. This will cover comprehensive and end to end network functionality testing, including IMS-based services such as Voice and Messaging, from 4G, 5G and Wi-Fi access. The test engineer will also verify platform resiliency, negative scenarios and load & performance test cases. The overall objective is to verify functionality and reliability on IMS Network Applications deployed on a private cloud infrastructure.
The Test Engineer should have the following technical background and experience:
Familiarity with 4G/LTE and 5G SA Cellular Network, including Packet Core and IMS Core.
Familiarity and experience with IMS/SIP signaling including LTE/5G and IMS Network registration, VoLTE/VoNR call set-up, SMS/RCS message signaling, network SIP routing.
Experience in lab testing procedures, test cases review and tracking and issue logging and network troubleshooting.
Experience with Network Tools such as Netscout, Wireshark and Landslide, as well as device test-based tools.
Experience with Cloud Network platform technology such as Kubernetes and RedHat OCP/OpenShift Container Platform.
Experience with Core Network Platforms from Mavenir, Nokia or Ericsson.
Mandatory Areas
Must Have Skills
Skill 1 IMS/SIP signaling knowledge including LTE/5G and IMS Network registration
Skill 2 VoLTE/VoNR call setup and SMS/RCS signaling understanding
Skill 3 Experience in testing lab environments including test case review, tracking, and defect logging
Skill 4 Hands-on with tools such as Wireshark, Netscout, and Landslide
Skill 5 Experience with Kubernetes and RedHat OCP/OpenShift
Skill 6 Familiarity with Core Network Platforms like Mavenir, Nokia, or Ericsson
Skill 7 Network troubleshooting and performance analysis skills
Skill 8 Understanding of 4G/LTE and 5G SA network architecture, including Packet Core and IMS Core
Domain Experience (If any)
Telecom Mobile Core Networks, IMS, and Cloud Network Infrastructure
Must Have Certifications
Not mandatory but certifications in Kubernetes (CKA), RedHat OpenShift, or SIP/IMS technologies will be a plus.
The ideal candidate should have:
1. IMS domain Expertise
2. Call flow knowledge
3. Core network architecture understanding for Nokia / Ericsson / Mavenir
4. Call flow knowledge
5. Test / tool knowledge understanding
6. Cloud architecture / Kubernetes knowledge basic understanding
Need a short write up from the candidates on the following skills:
IMS Network Applications on Private Cloud
4G, 5G, Wi-Fi access testing (Voice, Messaging)
IMS/SIP signaling (registration, call set-up, messaging)
Lab testing, issue logging, network troubleshooting
Network Tools (Netscout, Wireshark, Landslide, UE-based tools)
Cloud platform experience (Kubernetes, OpenShift)
Core Platforms (Mavenir, Nokia, Ericsson)
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