Modem Test Engineer

Posted: Saturday, 24 January 2026
Valid Thru: Monday, 23 February 2026
Index Requested on: 01/24/2026 08:14:21
Indexed on: 01/24/2026 08:14:21

Location: San Diego, CA, 92101, US

Industry: Advertising and Public Relations
Occupational Category: 13-0000.00 - Business and Financial Operations
Type of Employment: FULL_TIME

Kaleidoscope Animations is hiring!

Description:

JD - SD Modem Test Engineer Role

Location: US - San Diego

  1. Role & Responsibility
  • 12+ years of progressive experience in software testing and quality assurance, with 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
  • 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), adhering to 3GPP specifications and protocols.
  • Exceptional knowledge of IP networking (TCP/IP, VLANs, routing, firewalls).
  • Proficient in developing automated test cases via frameworks like Google LTP, with strong root cause analysis skills for script/infrastructure failures. Possesses excellent knowledge of TCP flows and data communication. Exceptional knowledge of test equipment platforms such as Anritsu, RNS with preference of Amarisoft system and work with Vendors to manage and maintain the equipment issues and software patch upgrade.
  • 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.
  • Ability to isolate the test failures arising from Infrastructure, scripts or the Wireless/IMS protocol stack and diligent verification of resolved issues.
  • Collaborate with development and integration teams to analyze test failures using tools such as ShannonDM, QXDM, or similar proprietary tools, identifying the root cause of issues related to signaling, protocol failures, or performance.
  1. 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, and knowledge of basic call flows in 3G, LTE, VoLTE and 5G
  • 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

Responsibilities:

Please review the job description.

Educational requirements:

  • high school

Desired Skills:

Please see the job description for required or recommended skills.

Benefits:

Please see the job description for benefits.

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