Kaleidoscope Innovation

Modem Test Engineer

Kaleidoscope Innovation

full-time

Posted on:

Location Type: Office

Location: San Diego • California • United States

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Job Level

SeniorLead

Tech Stack

AndroidJavaPython

About the role

  • Develop & Deploy the automation solution for manual test plans and test cases for IMS features (VoNR, VoLTE, ViLTE, VoWiFi, RCS) and Modem functionalities (call processing, data throughput, mobility, power consumption)
  • Adhere to 3GPP specifications and protocols
  • Perform weekly regression, sanity, feature-specific, and performance testing to ensure the quality and stability of new software releases
  • Isolate, reproduce, and accurately report defects using bug tracking systems such as Buganizer
  • Collaborate with development and integration teams to analyze test failures using tools such as ShannonDM, QXDM, or similar proprietary tools

Requirements

  • 12+ years of progressive experience in software testing and quality assurance
  • At least 8 years focused specifically on IMS/VoNR/VoLTE/VoWiFi/5G UE testing and automation development
  • Strong, in-depth understanding of the IMS architecture, call flows, interfaces, and key protocols such as SIP, Diameter, RTP/RTCP
  • Proficient in developing automated test cases via frameworks like Google LTP
  • Excellent knowledge of TCP flows and data communication
  • Exceptional knowledge of test equipment platforms such as Anritsu, RNS
  • Mandatory Minimum Bachelor's Degree in Telecommunications Engineering or Computer Science
  • Proficient in Callbox testing, including Amarisoft TE, Keysight, R&S
  • Experience in modifying/executing the TE scripts
  • Understanding of mobile telecom concepts based on 3GPP standards and protocols
  • Proficiency in Python, Java
  • Experience in wireless modem (3G, 4G, 5G) protocol testing with mobile handsets
  • Mobile app testing - Android
  • Well versed with LTE, NR callflows
  • Knowledge of IMS Core, SIP packets is a huge plus
  • Troubleshooting skills, review failure result and identify the root cause
  • Multi-tasking capability
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
automation developmentautomated test casesIMS architectureSIPDiameterRTPPythonJavaLTE5G UE testing
Soft Skills
troubleshootingmulti-taskingcollaborationcommunication
Certifications
Bachelor's Degree in Telecommunications EngineeringBachelor's Degree in Computer Science