Modem Chipset Lab Test Engineer

Job Description

About the Role:

We are seeking a Mobile Lab Test Engineer to support 5G/LTE and NTN (Non-Terrestrial Network) / Satellite validation in controlled lab environments. This role focuses on RF testing, protocol validation, log analysis, and system integration using industry-standard test equipment and tools.
You will work closely with R&D and carrier teams to validate device performance, network behavior, and feature functionality across 3GPP-based cellular and satellite systems.

Key Responsibilities

• Perform lab-based testing for 5G NR, LTE, 3G, and NTN/satellite networks
• Execute RF, protocol, and performance testing (throughput, latency, call scenarios)
• Set up and configure lab test environments using RF equipment and network simulators
• Operate and manage test systems and tools:
  • Spirent, Keysight, R&S (Rohde & Schwarz), Anritsu, Anite
• Capture and analyze logs using QXDM, QPST, XCAL/XCAP, Shannon DM
• Troubleshoot VoLTE/VoNR, data connectivity, signaling, and protocol issues
• Perform protocol stack analysis aligned with 3GPP standards
• Validate software/modem updates, patches, and new feature implementations
• Conduct packet-level analysis using Wireshark (TCP/IP, UDP)
• Develop and execute test plans and test cases (devices, configurations, KPIs)
• Document results and produce clear technical reports
• Collaborate with R&D, QA, and carrier labs to resolve defects and improve performance
• Support field testing activities as needed

Required Qualifications

• Bachelor’s degree in Telecommunications, Electrical Engineering, Computer Science, or equivalent experience
• Hands-on experience in lab testing / RF testing / telecom testing
• Strong knowledge of 5G NR, LTE, WCDMA/UMTS, GSM
• Working knowledge of NTN / satellite communications concepts (LEO/GEO, latency, coverage)
• Experience with RF test equipment (Spirent, Keysight, R&S, Anritsu, Anite)
• Experience with log analysis tools (QXDM, QPST, XCAL, Shannon DM or similar)
• Understanding of network protocols (TCP/IP, UDP, OSI model)
• Experience with Android device testing and mobile software validation
• Familiarity with VoLTE/VoNR, data testing, and KPI validation
• Proficiency in Microsoft Office for reporting
• Strong analytical and troubleshooting skills

Preferred Qualifications

• Experience with 3GPP Release 17+ NTN standards or Direct-to-Device (D2D)
• Knowledge of 5G protocol stack (PHY, MAC, RRC, NAS signaling)
• Experience in carrier certification or device validation labs
• Familiarity with Wireshark, GNSS/GPS, RF propagation concepts
• Basic scripting (Python, ADB, Shell) for test automation
• Experience with Wi-Fi, Bluetooth coexistence testing

Work Environment

• Primarily lab-based testing with controlled network and RF conditions
• Hands-on work with RF equipment, network simulators, and mobile devices
• Occasional extended hours or weekend testing based on project needs

Requirements

• Ability to work in a lab environment with test equipment and hardware setups
• Basic understanding of system integration and test configuration management

$24.00 - $100.00