Embedded Systems Engineer — FreeRTOS

About the Company

Mesodyne builds compact, silent thermophotovoltaic generators — MIT-born LightCell tech that runs on any fuel and lasts 10x longer than batteries or engines. We serve industrial and defense customers with active contracts and a growing pipeline. We can not provide visa sponsorship at this time.

About the Role

We're looking for an Embedded Systems Engineer who loves being close to the hardware. You'll develop the real-time "brain" of the LightCell — firmware running at the bare-metal and RTOS level on STM32 microcontrollers, directly controlling micro-pumps, proportional valves, high-current igniters, blowers, and other actuators.

What You'll Do

• Develop, test, and debug low-overhead C/C++ firmware implementing the state machines and real-time control loops that govern LightCell operations
• Architect and optimize multi-threaded tasks using FreeRTOS on STM32, ensuring precise scheduling, task prioritization, and low-latency safety controls
• Write and validate robust custom drivers for digital and analog peripherals over SPI, I2C, UART, and CAN
• Serve as the primary technical bridge at the hardware-firmware boundary, isolating bugs using oscilloscopes, logic analyzers, and JTAG/SWD debuggers
• Write automated test scripts (Python) to interface with hardware for high-speed data logging and long-duration system characterization

What We're Looking For

• B.S. or M.S. in Computer Science, Electrical Engineering, Computer Engineering, or a related field
• 3+ years of professional experience in bare-metal or RTOS firmware development for complex electromechanical, robotic, or medical systems
• Strong C/C++ skills for deeply embedded microcontrollers, with a passion for clean, modular, well-documented code where failures have physical consequences
• Ability to read schematics, locate test points on a PCB, and confidently use hardware lab diagnostic tools

Location

On-site, full-time, in Somerville, MA.