Modem Chipset Field Test Engineer

Location: Bellevue, WA (Onsite / Field-Based)
Travel: up to 10-15%
Job Type: Full-Time

About the Role

We are seeking a Mobile Field Test Engineer to support 5G/LTE and NTN (Non-Terrestrial Network) / Satellite testing in real-world environments. This role focuses on end-to-end validation, log analysis, and troubleshooting across terrestrial and satellite (LEO/GEO, Direct-to-Device) networks in collaboration with R&D, QA, and carrier teams.

Key Responsibilities

• Perform field/drive testing for 5G NR, LTE, 3G, and NTN/satellite networks
• Execute RF, mobility, and data performance testing (throughput, latency, call scenarios)
• Validate handover between cellular and satellite (NTN) networks
• Capture and analyze logs using QXDM, QPST, XCAL/XCAP, Shannon DM
• Troubleshoot VoLTE/VoNR, data connectivity, and network performance issues
• Develop and execute test plans (routes, devices, KPIs, network conditions)
• Perform packet analysis using Wireshark (TCP/IP, UDP)
• Validate software/modem updates and feature enhancements
• Document results and deliver clear technical reports
• Configure and maintain test devices, SIM/eSIM, and test environments
• Collaborate with carrier labs, OEMs, and chipset teams for issue resolution

Required Qualifications

• Bachelor’s degree in Telecommunications, Electrical Engineering, Computer Science, or equivalent experience
• Hands-on experience in mobile field testing / wireless / telecom testing
• Strong knowledge of 5G NR, LTE, WCDMA/UMTS, GSM
• Working knowledge of NTN / satellite communications (LEO/GEO, latency, coverage)
• 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
• Hands-on exposure to Direct-to-Device (D2D) satellite connectivity
• Understanding of 5G protocol stack (PHY, MAC, RRC, NAS signaling)
• Experience in carrier certification or satellite communication testing
• Knowledge of GNSS/GPS, RF propagation, and mobility scenarios
• Familiarity with automation/scripting (ADB, Python, Shell)
• Experience with Wi-Fi, Bluetooth coexistence testing

Work Environment

• Combination of field testing (drive/walk testing) and lab validation
• Testing may include outdoor, remote, or limited-connectivity environments
• Requires travel (up to 15%) based on project scope
• May require extended hours or weekend work for test cycles and deployments
• Hands-on work with mobile devices, RF equipment, and satellite-enabled hardware

Requirements

• Valid driver’s license and ability to travel to test locations
• Ability to work in field environments and handle test equipment