Modem Chipset Lab Test Engineer

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

Do you have experience in Wi-Fi protocol?, * 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

4.24.2 out of 5 stars San Diego, CA 92121 $24 - $100 an hour - Full-time, We’re committed to creating a workplace where employees feel valued, supported, and empowered to grow. Our team benefits from competitive compensation, comprehensive health and wellness offerings, and opportunities for professional development. We are proud to be an equal opportunity employer and make all employment decisions without regard to race, color, religion, sex (including pregnancy, sexual orientation, and gender identity), national origin, age, disability, genetic information, veteran status, or any other legally protected status.