Protocol Engineer

We are seeking a Protocol Engineer to perform the verification and carrier certification of next-generation mobile and IoT devices. This is a high-impact role focused on the deep-dive signaling handshake between the device and the network. We aren't looking for RF generalists; we need a specialist who can own the protocol stack from lab simulation to real-world field validation in Fremont, CA Responsibilities Key Responsibilities • Carrier Certification: help drive the end-to-end verification process for T-Mobile, AT&T, and Verizon Lab & Field testing. • Emergency Services (Must-Have): perform the validation of critical signaling protocols, including E911, RTT, LPPe, and PIDF-LO. • Network Emulation: Execute complex test plans using Keysight, Rohde & Schwarz (R&S), or Spirent simulators to mimic carrier-specific environments. • Field & Drive Testing: Validate 5G (SA/NSA) and 4G/LTE features through rigorous drive testing for Mobile and IoT DUTs. • Deep-Dive Debugging: Analyze modem logs and debug reported issues using QXDM, QCAT, ADB, and Wireshark to ensure protocol compliance. Requirements Qualifications • Experience: 5 to 10 years in 5G/LTE Protocol Verification. • Bachelor's degree in Electrical Engineering, Electronics, Computer Engineering, or a related field. • Signaling Expertise: Strong fundamental knowledge of SA/NSA and LTE features and protocol layers. • Emergency Protocols: Demonstrated experience with E911 and RTT is a mandatory requirement. • Tool Proficiency: Expert-level skills with Qualcomm tools (QXDM/QCAT) and log analysis. • Certification History: Proven experience meeting AT&T, T-Mobile, and Verizon certification standards