Hardware Test Engineer

About Hexmodal

Hexmodal builds smart devices and a simple software platform that help facilities teams automate routine compliance testing, monitoring, and documentation. Our technology helps teams spend less time on manual rounds and more time on the maintenance work that keeps buildings operating safely. Today, Hexmodal supports more than 180 health systems across 48 states.

We are looking for a Hardware Test Engineer to help us validate, qualify, and manufacture our connected compliance devices. You will work across the full test lifecycle — from bench-level characterization of new hardware, through building the automated test equipment (ATE) and fixtures used on our production lines, to writing the test software that keeps our contract manufacturers running smoothly, to building the canary fleets and reliability programs that catch issues in the field before our customers do.

You will also own our RMA process end to end — when a device comes back from the field, you're the one who owns getting it diagnosed, root-caused, and closed out with a real corrective action. You put reliability and customer trust first, and you use data, not gut feel, to know when a product is truly ready. This role reports to the Head of Hardware Engineering and is based on-site at our NYC HQ.

• Develop and execute test plans for new hardware builds, including bring-up, functional characterization, environmental testing, and qualification of PCBAs and finished devices.

• Design, build, and maintain automated test equipment (ATE) and custom test fixtures used in production and incoming inspection.

• Own the end-to-end RMA process for defective devices returned from the field — intake, triage, diagnostic testing, and disposition of every unit that comes back from a customer site.

• Write and maintain test automation software and scripts (e.g., Python) to drive test stations, collect data, and generate pass/fail reporting.

• Partner with electrical, mechanical, and firmware engineers during design reviews to influence design-for-test (DFT) and design-for-manufacturing (DFM).

• Analyze test and field-failure data to identify trends, drive root-cause analysis, and lead corrective actions with cross-functional teams.

• Support new product introduction (NPI), transferring test procedures and fixtures from engineering to our contract manufacturers.

• Troubleshoot production test failures on the line, working directly with contract manufacturing partners to resolve issues quickly.

• Design and build "canary" device fleets that continuously exercise our hardware, firmware, and connectivity stack under real and simulated field conditions — power cycling, network dropout, temperature/humidity swings, RF interference, and other edge cases our products see in the field.

• Own reliability testing for new and existing products, including accelerated life testing (ALT), HALT/HASS, and environmental stress screening, and translate results into design changes that close out failure modes.

• Coordinate with external certification and test labs (e.g., UL, FCC, NFPA, environmental/reliability testing) — scoping test plans, shipping units, reviewing lab reports, and driving required design changes to closure.

• Lead root cause analysis on field failures and RMAs, and drive corrective and preventive action (CAPA) with hardware, firmware, and manufacturing teams to close the loop so issues don’t repeat.

• Track and report on RMA volume, failure modes, and time-to-resolution, and use that data to prioritize what gets fixed in the next design or production revision.

• Maintain clear, up-to-date test documentation, procedures, and calibration records for lab and production…