Cellular QA Engineer Location: Greenwood Village, Colorado Duration: 6+ months contract Candidates who can work independently are more preferred. Required Skills: Min 5+ yrs of Experience with different Cellular/Mobile Devices based on iOS operating systems - Strong knowledge of 3GPP 5G SA/NSA, 4G LTE mobile technologies and architecture. - Good understanding of 3GPP standards ; signaling call flows, Layers 1/2/3 - Develop and execute device test plans, and validate Mobile device cellular feature capabilities 5G, VoNR, VoLTE, VoWiFi, LTE) - Experience with different cellular modem chipsets Qualcomm (QCOM), MediaTek (MTK), Samsung (LSI), etc - Experience with modem logging/analysis tools such as QXDM, QPST, XCAL, XCAP - Familiarity with SIM / eSIM design and provisioning flows - Experience in testing Wi-Fi and Passpoint configurations (HS2.0/802.1x/WPA3) - Analyze, determine, and document issues; Communicate testing progress / technical reports - Basic programming skills, especially on Python - Is Proactive and works independently with minimal supervision