Modem Test Engineer

Excelon Solutions; Mountain View (CA); On-site; USD 100,000 - 130,000; Full time

Job summary

A technology firm in California is seeking a Mid-Senior level contractor for testing roles involving 5G/4G/3G protocols in Mountain View. This position requires a Bachelor's or Master's degree in a relevant field, plus 8+ years of testing experience. The ideal candidate will demonstrate strong troubleshooting skills, collaboration across teams, and familiarity with key testing equipment such as Keysight and Rohde & Schwarz. This is a contract position focused on IT system testing and evaluation.

Qualifications

• 8+ years of hands-on testing experience in cellular modem protocols.
• Strong understanding of LTE and NR Carrier specifications.
• Non-Terrestrial Networks (NTN) testing experience is highly desirable.

Responsibilities

• Execute test plans targeting 5G NR and LTE protocol features.
• Isolate complex issues across multiple protocol layers.
• Collaborate with teams to lead testing activities.

Skills

Testing experience in 5G/4G/3G Cellular modem protocols

Understanding of 3GPP and Carrier specifications

Hands-on experience with test equipment

Ability to analyze logs and troubleshoot

Collaboration with cross-functional teams

Education

Bachelor's or Master's degree in Electrical Engineering or related field

Tools

Keysight

Rohde & Schwarz

Job description

Hiring Mode: Contract -TP

Location: MountainView, CA

Job Description

• Bachelor’s or Master’s degree in Electrical Engineering, Computer Science, Telecommunications, or related field.
• 8+ years of hands-on testing experience in 5G/4G/3G Cellular modem chipset or device (UE) Protocol conformance, performance, and interoperability.
• Strong understanding of 3GPP and Carrier specifications for LTE and NR.
• Execute test plans targeting 5G NR and LTE L2/L3 protocol features (RLC, PDCP, MAC, RRC, NAS).
• Expertise in 3GPP/IMS Protocol call flows to analyze logs and troubleshoot issues in UE/network protocol interactions.
• Ability to isolate complex issues across multiple protocol layers and identify root causes using trace analysis tools.
• Collaborate with cross‑functional teams to lead and drive testing activities.
• Hands‑on experience with test equipment for GCF, PTCRB, Carrier certification (e.g., Keysight, Rohde & Schwarz).
• Non‑Terrestrial Networks (NTN) testing experience is highly desirable.

Seniority Level

Mid‑Senior level

Employment Type

Contract

Job Function

Information Technology

Industries

IT System Testing and Evaluation

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