Cellular Validation EngineerKey ResponsibilitiesPerformance characterization: Plan and run device-level cellular performance tests (throughput, latency, TX power, mobility/handover, power consumption) across LTE, 5G NR (SA/NSA), and legacy RATs as applicable.Lab bring-up: Lead hands-on bring-up of new cellular connectivity on new hardware and software platforms, from first attach and data call through stable, production-ready performance.Chipset configuration: Configure and tune cellular modem/chipset settings at the device level, including band configuration, NV/EFS items, carrier and PLMN settings, APN/PDN setup, and feature enablement (CA, EN-DC, VoLTE/VoNR, PSM/eDRX).Network-side setup: Configure and operate base station emulators and test networks (e.g., Keysight/Anritsu/R&S call boxes, private LTE/5G networks, small cells, or open-source cores) to replicate real-world and corner-case network conditions.Log analysis and root cause: Capture and analyze modem and protocol logs (QXDM/QCAT, PCAP, AT-command traces, network-side logs) to isolate and root-cause failures in attach, registration, RRC/NAS signaling, mobility, throughput, and RF performance.Cross-functional debugging: Work with chipset vendors, RF/antenna, hardware, firmware, and software teams to drive issues to resolution; file and track issues with clear reproduction steps and evidence.Test development: Define test plans and acceptance criteria; build or extend automation scripts for repeatable characterization and regression testing.Reporting: Document results, performance baselines, and debug findings, and present recommendations to engineering and program stakeholders.Required QualificationsBachelor's or Master's degree in Electrical Engineering, Telecommunications, Computer Engineering, or a related field.10+ years of hands-on experience in cellular device connectivity, modem integration, or cellular system test.Solid understanding of the end-to-end cellular protocol stack (PHY, MAC, RLC, PDCP, RRC, NAS) and core network procedures for LTE and 5G NR.Strong grasp of cellular concepts: scheduling, link adaptation, power control, and key RF metrics (RSRP, RSRQ, SINR, CQI).Experience configuring cellular chipsets at the device level (e.g., Qualcomm, MediaTek, Samsung modules).Proficiency with log extraction and analysis tools such as QXDM / QCAT / PCAT, plus Wireshark and vendor-specific modem tools.Hands-on experience setting up the network side, using base station emulators (Keysight UXM, Anritsu MT8000, R&S CMX/CMW) and/or live or private networks.Proven track record of lab bring-up of new cellular hardware or software and of root-causing complex connectivity issues.Comfortable working with lab equipment: spectrum analyzers, signal generators, RF shield boxes, channel emulators, and power analyzers.Experience with technologies RedCap and low-power optimization.Scripting and automation skills (Python, Bash) for test automation and log parsing.Must-Have Skills1Call box experience — demonstrated hands-on work with the base station emulators / call boxes used for cellular validation.2Cellular knowledge — a minimum of 2–5 years of direct cellular experience (within an overall 10+ year career profile).3Qualcomm chipset experience — direct, hands-on work with Qualcomm chipsets, which are used across all Meta device validation.Nice-to-have Skills1Industry experience with Qualcomm chipsets and Qualcomm logs — the single biggest differentiator on a resume, since Qualcomm logging is used throughout validation.2Background at Apple or a major telecom/OEM — these profiles tend to carry the relevant Qualcomm and cellular device exposure.3Test automation experience — Python/Bash scripting for repeatable characterization, regression testing, and log parsing."Pursuant to the California Fair Chance Act, Los Angeles County Fair Chance Ordinance for Employers, Los Angeles Fair Chance Initiative for Hiring Ordinance, and San Francisco Fair Chance Ordinance, qualified applicants will be considered for assignment with arrest and conviction records. Criminal history may have a direct, adverse, and negative relationship with some of the material job duties of this position. These include the duties and responsibilities listed above, as well as the abilities to adhere to company policies, exercise sound judgment, effectively manage stress and work safely and respectfully with others, exhibit trustworthiness, meet client expectations, standards, and accompanying requirements, and safeguard business operations and company reputation."
Net-new headcount to fill a capacity gap in cellular system validation ahead of multiple cellular product launches next year.
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At SPECTRAFORCE, we are committed to maintaining a workplace that ensures fair compensation and wage transparency in adherence with all applicable state and local laws. This position's pay range is $7.25/hr - $80.00/hr.
