Cellular Signaling Software Engineer

at LitePoint in Deer Park, Illinois, United States

Job Description

LitePoint Corporation seeks Cellular Signaling Software Engineer in Deer Park, IL


  1. Work on 5G NR FR1 & FR2, LTE-Advanced, LTE FDD, LTE TDD, WCDMA & GSM Signaling protocols.
  2. Design and develop Cellular Software applications and test/integrate with the latest mobile devices.
  3. Perform debugging and Analysis of gNB, Core Network, UE logs.
  4. Responsible for end-to-end performance assurance to ensure company’s 4G and 5G products (DU, RU, CU and AU) are fully compliant with 3GPP requirements.
  5. Responsible for multiple phases of development for LitePoint IQcell-5G Signaling test product, including integrated iperf3 application and verifying/testing it over 5G FR1, FR2 in SA &NSA modes with multiple mobile devices.
  6. Develop, integrate, and test a logging application using NFS and TCP/IP to manage multiple logging interfaces in LitePoint test equipment.
  7. Develop, integrate, and test internet connectivity application to mobile devices using LitePoint’s IQcell-5G for 5G FR1, FR2 - SA & NSA modes connectivity and test equipment’s Ethernet/optical-fiber connection to Internet
  8. Debug and fix critical issues from LitePoint customers worldwide.
  9. Debug and fix startup issues, protocol bugs and test regression issues.
  10. Participate in enhancements, requirements, design and development meetings and brain storming sessions for the future enhancements features of test equipment.


Requires a Bachelor’s degree in Electrical Engineering or a related field, plus 5 years of related experience. Additionally, requires 5 years of experience with each of the following:

  1. Debugging and analyzing gNB, eNB, UE and Core Network logs.
  2. 4G/5G Call Processing experience with RRC, S1-MME, S1-U, X2, RLC, MAC, or PHY protocols and understanding of concepts including Hybrid Beamforming, Massive MIMO, NewWaveforms, LTE-NR interworking & co-existence, or 5G Numerologies.
  3. 3GPP RAN product architecture.
  4. RLC/MAC layer and different types of control channel and traffic channels, network access procedures, power control, handover algorithms, QoS types, TDD/FDD modes, or HARQ/ARQ concepts.
  5. C, C++, or Linux/Unix (CentOS or Ubuntu) and Windows OS.
  6. Debugging tools including Qualcomm QXDM and QSPR.
  7. 3GPP specification for LTE/LTE-A/5G features and Protocols.


10% of domestic and international travel required.

$134,118 to $139,200 per year. Applicants who are interested in this position may apply to Reference #79945 for consideration.

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Job Posting: 11230925

Posted On: Aug 28, 2023

Updated On: Oct 02, 2023

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