Test Engineer

Role SummaryThe Senior Test Engineer is the technical anchor for Client's wireless device certification and production support work at Bell Works. This is a hands-on, dual-purpose role: leading certification execution across AT&T, Verizon, and T-Mobile while also serving as the lead investigator on production cellular issues that escalate from Client's customer base. The Senior Test Engineer partners closely with Client's existing wireless engineering team bringing immediate relief to a multi-week certification backlog and milestone tied to new SIM profile introductions. This engineer also helps shape and adopt the test automation framework — moving the team from manual execution toward repeatable, automated certification cycles.Key ResponsibilitiesLead end-to-end device certification testing across AT&T, Verizon, and T-Mobile networksTest the full client device portfolio: headless devices, cellular routers, tablets, and OEM-supplied endpointsOwn QXDM-based diagnostic capture, log parsing, and root cause analysis for both certification failures and production escalationsManage SIM provisioning and validation across physical SIM, eSIM, and iCC profiles, including new SIM profile introduction work tied to the May 22 milestoneInvestigate and resolve production cellular issues — registration failures, attach/detach behavior, throughput, latency, PLMN, and APN problemsDefine and maintain test plans, test cases, and acceptance criteria for new device certifications and firmware updatesPartner with development team on the test automation framework — contribute test cases, validate automation outputs, and migrate manual procedures into automated execution as the framework maturesCoordinate carrier engineering contacts at AT&T, Verizon, and T-Mobile for test SIM allocation, lab access, and field-level escalationsDocument findings, runbooks, and diagnostic playbooks for the broader MetTel wireless teamProvide technical input to leadership on capacity planning, automation priorities, and contractor team scalingRequired Qualifications7+ years of cellular device testing, certification, or wireless engineering experienceDemonstrated expertise with QXDM (or QCAT) — hands-on log capture, parsing, and root cause analysisDirect certification experience across AT&T, Verizon, and T-Mobile — including PLMN, APN, IMS registration, and SIM lifecycle behaviorStrong working knowledge of physical SIM, eSIM, and iCC provisioning workflowsHands-on experience testing diverse device types — headless cellular endpoints, routers, tablets, and OEM devicesWorking knowledge of network testing concepts (throughput, latency, signal quality, mobility) sufficient to triage production issues without requiring a dedicated network engineerAbility to interpret AT command behavior and modem-level diagnostics across major chipsets (Qualcomm, MediaTek, Sequans, or similar)Comfortable scripting in Python or similar to extract and analyze diagnostic data and to contribute to test automationClear, concise written and verbal communication — able to mentor junior engineers and brief stakeholdersMust be able to work on-site at Bell Works in Holmdel, NJ 2–3 days per weekPreferred QualificationsPrior experience supporting an MNO, or a managed mobility services environmentExposure to PTCRB or GCF certification programsExperience with test automation frameworks (Robot Framework, Appium, pytest) — even at a basic levelBackground in IoT modem certification, asset trackers, or industrial cellular endpointsFamiliarity with Salesforce-driven case management or workflow toolsITIL Foundation or equivalent operational support training