Modem Test Engineer

Job Role: Modem Test Engineer

Job Location: Mountain View, CA (Onsite)

Contract Role

Experience Level: 6 to 12 Years

We are looking for an experienced Modem Test Engineer with strong hands-on expertise in 5G/4G/3G cellular modem testing. The ideal candidate will have deep knowledge of 3GPP standards, LTE and NR protocols, and extensive experience with protocol conformance, performance, and interoperability testing.

Key Responsibilities

• Execute and manage test plans for 5G NR and LTE L2/L3 protocol features including RLC, PDCP, MAC, RRC, and NAS.
• Perform protocol conformance, performance, and interoperability testing on cellular modem chipsets or UE devices.
• Analyze modem and network logs using 3GPP/IMS protocol call flows to identify, debug, and resolve issues.
• Isolate complex issues across multiple protocol layers and identify root causes using trace analysis tools.
• Work closely with cross-functional teams (development, systems, QA, and carriers) to drive testing activities and ensure product quality.
• Support GCF, PTCRB, and carrier certification testing efforts.

Required Qualifications

• Bachelor's or Master's degree in Electrical Engineering, Computer Science, Telecommunications, or a related field.
• 8+ years of hands-on testing experience with 5G/4G/3G cellular modem chipsets or UE devices.
• Strong understanding of 3GPP standards and carrier specifications for LTE and NR.
• Solid experience with protocol conformance, performance, and interoperability testing.
• Hands-on experience with certification and test equipment such as Keysight and Rohde & Schwarz.

Preferred Skills

• Strong troubleshooting and analytical skills
• Excellent communication and collaboration abilities
• Experience working in fast-paced, cross-functional engineering environments