Staff /Sr. Staff Test Platform & Firmware Integration Engineer
Lightmatter · Mountain View, CA
About this role
**Staff / Sr. Staff Test Platform & Firmware Integration Engineer** **About Lightmatter** Lightmatter is leading the revolution in AI data center infrastructure, enabling the next giant leaps in human progress. The company invented the world’s first 3D-stacked photonics engine, *Passage™*, capable of connecting thousands to millions of processors at the speed of light in extreme-scale data centers for the most advanced AI and HPC workloads. Lightmatter raised $400M in its Series D round, reaching a valuation of $4.4B. --- ## About this Role We are building **System Level Test (SLT)** for our next-generation high-speed optical interconnect products. This role involves bringing up and operating **firmware on test boards** and the **test platforms** that run on top of it. You will own the firmware layer for test, build the executive and datalog that make test flows repeatable and operator-runnable, and carry them from engineering bring-up through board-level test and transfer to manufacturing partners. This is a **senior individual-contributor** role on a small, growing team with broad ownership and direct impact on how the test platform is built. --- ## Responsibilities - **Own firmware bring-up and integration on SLT boards**: boot and image management across board/product variants, device initialization to a known state, diagnostic APIs, register-level read/write, and mode/state control. - **Validate firmware release readiness for test**: ensure required hooks exist and drive gaps to closure with the firmware team. - **Own board-level functional test integration** for assembled photonic boards: firmware load across multiple devices, calibration and device-programming content, pass/fail limits, retest policy, and dry-run controls around irreversible operations. - **Architect and build the SLT test executive**: configuration-driven test sequences, instrument/device abstraction, guaranteed safe-state on abort, and a datalog supporting comparison across time and test insertions. - **Build and operate continuous regression** on bench hardware: scheduled runs, change detection for firmware/test content, and version control of test sequences and limits for reproducible production flow. - **Lead root cause** of intermittent and order-dependent test failures by separating test-software, firmware, and hardware causes and driving fixes. - **Produce operator procedures and documentation**: test-plan and release documentation, plus transfer packages for technicians/manufacturing partners. - **Set software discipline and mentor** early-career engineers in test automation practice, code review, and documentation. --- ## Qualifications - **BS** in Electrical Engineering, Computer Engineering, Computer Science, or related field **+ 8+ years** relevant experience. - Hands-on **platform bring-up on embedded Linux**: boot sequence, boot-source/strap configuration, flash/memory initialization, bootloader/kernel, debugging with console/JTAG/logs. - Experience validating **firmware-level features across releases**: image management across variants, upgrade/recovery, secure boot, warm restart/state preservation. - Built a **test automation framework** from scratch for a hardware product and drove adoption as daily regression. - **Hardware-in-the-loop** test experience with real DUTs, fixtures, instruments, including fault injection and negative testing. - Strong **Python** for test automation; comfortable with Linux CLI, Git, and CI-integrated test e
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