Modem Chipset Field Test EngineerLocation: [Bellevue, WA] (Onsite / Field-Based)
Travel: up to 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

Why work at BTI?

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.

We comply with all applicable federal, state, and local employment laws, including those related to fair hiring practices, pay transparency, workplace safety, and reasonable accommodations. We are dedicated to maintaining an inclusive environment where everyone has the opportunity to succeed and contribute meaningfully.