Cellular Device Testing (5G SME)

American IT Systems•Redmond, WA

5d•Onsite

About The Position

We are seeking a Cellular Subject Matter Expert (SME) to support OEM side 5G device validation across 5G NR (NSA & SA) device development. This role requires deep hands on expertise in cellular technologies, strong understanding of 5G protocol behavior, and the ability to independently drive device quality, issue analysis, and carrier readiness from an OEM perspective.

Requirements

Strong hands on experience with 5G NR device testing (NSA & SA).
Solid understanding of LTE, IMS, VoLTE, EPS fallback, and 5G call/data flows.
Ability to interpret protocol logs, call flows, and KPIs.
Experience working with Windows based devices from a cellular perspective.
Experience with lab and field test environments.
Strong troubleshooting skills using logs, traces, and performance metrics.
Experience of working with Qualcomm and MediaTek chipsets.
Bachelor's or Master's degree in Telecommunications, Electronics, or Computer Science.
Proven experience in cellular device testing, with strong emphasis on 5G.
Strong analytical mindset with attention to detail.
Ability to work independently as a technical expert.
Clear technical communication with internal teams and external partners.
Quality driven, execution focused approach.

Nice To Haves

Prior work on OEM programs or chipset driven device validation is highly preferred.
Basic automation scripting exposure (Python / Shell).
Experience of testing Wi-Fi and Bluetooth scenarios.

Responsibilities

Act as cellular SME for 5G device behavior across NSA and SA architectures.
Validate 5G NR protocol stack behavior across: PHY, MAC, RLC, PDCP, RRC, NAS layers.
Provide expert analysis for 5G feature behavior, including: EN DC / NR DC, LTE–NR and NR–NR mobility, Carrier Aggregation, Beam management and reselection, EPS fallback and VoNR readiness.
Review device behavior against 3GPP and carrier specific requirements.
Execute hands on functional, regression, and interoperability testing on OEM devices.
Validate device performance on 5G, LTE, and IMS dependent features (VoLTE, VoNR readiness, data sessions).
Support engineering builds, pre production builds, and release candidates from a cellular perspective.
Analyze device capability matrices and ensure test coverage completeness.
Perform and analyze 5G performance testing, including: Throughput (DL/UL), Latency, Stability during prolonged sessions.
Compare performance against reference devices and KPIs.
Perform deep log and trace analysis (modem, protocol, network).
Isolate issues across device software, modem firmware, and RF interactions.
Work directly with chipset vendors to debug issues and validate fixes.
Re test fixes and ensure no regression across releases.
Execute and review 5G focused regression suites.
Support test automation efforts by validating scenarios, results, and coverage.
Provide SME input to improve test strategies and cellular coverage.