Role & seniority: Modem Test Engineer (Contract); onsite in Mountain View, CA; 6–12 years experience; seniority not explicitly listed.

Stack / tools: 5G/4G/3G cellular modem test; 3GPP LTE/NR standards; protocol conformance, performance, and interoperability testing; test equipment: Keysight, Rohde & Schwarz; protocol trace/diagnostic tools.

Top 3 responsibilities

Execute and manage test plans for 5G NR and LTE L2/L3 features (RLC, PDCP, MAC, RRC, NAS).
Perform protocol conformance, performance, and interoperability testing on modem chipsets or UE devices; analyze logs to identify issues.
Isolate complex issues across protocol layers, drive root-cause analysis with trace tools, and support certification efforts (GCF/PTCRB/carriers); collaborate with cross-functional teams.

Must-have skills

8+ years hands-on testing with 5G/4G/3G cellular modem chipsets or UE devices.
Deep knowledge of 3GPP standards and carrier specs for LTE and NR.
Experience with protocol conformance, performance, and interoperability testing.
Hands-on use of test/certification equipment (Keysight, Rohde & Schwarz).

Nice-to-haves

Strong troubleshooting and analytical abilities.
Excellent communication and cross-functional collaboration.
Experience in fast-paced engineering environments.
Location & work type: Mountain View, CA; onsite; contract role.

Full Description

Dice is the leading career destination for tech experts at every stage of their careers. Our client, Sira Consulting, is seeking the following. Apply via Dice today!

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

Seniority level Not Applicable Employment type Contract Job function Engineering and Information Technology Industries Software Development