Test Engineer

Role Summary

The 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 Responsibilities

• Lead end-to-end device certification testing across AT&T, Verizon, and T-Mobile networks
• Test the full client device portfolio: headless devices, cellular routers, tablets, and OEM-supplied endpoints
• Own QXDM-based diagnostic capture, log parsing, and root cause analysis for both certification failures and production escalations
• Manage SIM provisioning and validation across physical SIM, eSIM, and iCC profiles, including new SIM profile introduction work tied to the May 22 milestone
• Investigate and resolve production cellular issues — registration failures, attach/detach behavior, throughput, latency, PLMN, and APN problems
• Define and maintain test plans, test cases, and acceptance criteria for new device certifications and firmware updates
• Partner with development team on the test automation framework — contribute test cases, validate automation outputs, and migrate manual procedures into automated execution as the framework matures
• Coordinate carrier engineering contacts at AT&T, Verizon, and T-Mobile for test SIM allocation, lab access, and field-level escalations
• Document findings, runbooks, and diagnostic playbooks for the broader MetTel wireless team
• Provide technical input to leadership on capacity planning, automation priorities, and contractor team scaling

Required Qualifications

• 7 years of cellular device testing, certification, or wireless engineering experience
• Demonstrated expertise with QXDM (or QCAT) — hands-on log capture, parsing, and root cause analysis
• Direct certification experience across AT&T, Verizon, and T-Mobile — including PLMN, APN, IMS registration, and SIM lifecycle behavior
• Strong working knowledge of physical SIM, eSIM, and iCC provisioning workflows
• Hands-on experience testing diverse device types — headless cellular endpoints, routers, tablets, and OEM devices
• Working knowledge of network testing concepts (throughput, latency, signal quality, mobility) sufficient to triage production issues without requiring a dedicated network engineer
• Ability 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 automation
• Clear, concise written and verbal communication — able to mentor junior engineers and brief stakeholders
• Must be able to work on-site at Bell Works in Holmdel, NJ 2–3 days per week

Preferred Qualifications

• Prior experience supporting an MNO, or a managed mobility services environment
• Exposure to PTCRB or GCF certification programs
• Experience with test automation frameworks (Robot Framework, Appium, pytest) — even at a basic level
• Background in IoT modem certification, asset trackers, or industrial cellular endpoints
• Familiarity with Salesforce-driven case management or workflow tools
• ITIL Foundation or equivalent operational support training