Lightmatter
Embedded Software Engineer, Lasers
About this role
Lightmatter seeks an embedded software engineer to develop control and diagnostics firmware for photonic interconnect products in their Boston headquarters. You'll implement laser stabilization algorithms, manage transceiver telemetry, and collaborate with cross-functional teams to bring next-generation data center AI infrastructure to market.
What you'll do
- Implement laser control and stabilization algorithms on embedded systems using control theory approaches
- Develop and own firmware components for photonic transceiver diagnostics, telemetry, and monitoring from requirements through release
- Integrate transceiver management with data center standards like CMIS, OpenBMC, and DMTF
- Debug embedded systems using GDB, JTAG, logic analyzers, and oscilloscopes during hardware bring-up
- Characterize laser behavior with optical test equipment and build automated test scripts
- Contribute to architecture discussions with photonic, analog, digital, and systems engineers
What they're looking for
- C/C++ embedded software development
- Python for tooling and test automation
- Hardware debugging (GDB, JTAG, logic analyzers, oscilloscopes)
- Embedded peripherals and buses (I2C, SPI, UART, GPIO)
- RTOS development (FreeRTOS, Zephyr preferred) and bare-metal programming
- Git version control and CMake build systems
- Closed-loop control algorithm design and deployment
- Optical transceiver or photonic systems firmware experience
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Lightmatter
Lightmatter builds silicon photonics-based optical interconnect products and AI data center infrastructure powered by advanced photonic technologies. The company is hiring hardware validation engineers, mechanical designers, and mixed-signal validation engineers to design test systems, verify high-speed electro-optic links, develop server chassis platforms, and optimize photonic communication circuits.
- Website
- lightmatter.com
Likely interview questions
- Describe your experience bringing shipped embedded products to production—what was your role and what challenges did you face?
- Walk us through a time you debugged a complex hardware-software integration issue using tools like JTAG or oscilloscopes. What was your approach?