Job Title: Cellular Device Testing (5G SME)
Job Location: Remond, WA (Onsite for 5 days a week)
Job Type: Full-time
Job Description/ Job Summary:
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.
Core Responsibilities
- 5G Cellular Expertise
- 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
- LTEโNR and NRโNR 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.
Required Skills & Expertise
- 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.
Education & Experience
- Bachelorโs or Masterโs degree in Telecommunications, Electronics, or Computer Science.
- Proven experience in cellular device testing, with strong emphasis on 5G.
- Prior work on OEM programs or chipset driven device validation is highly preferred.
Soft Skills
- 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 Have
- Basic automation scripting exposure (Python / Shell).
- Experience of testing Wi-Fi and Bluetooth scenarios