Senior Software Engineer, Embedded Systems

Elroy builds autonomous aerospace systems for the real world. At the heart of those systems is a hard real time, safety critical software stack that has to work under any circumstances, with no margin for "close enough". The embedded software team writes the code that flies the plane in any conditions. This role spans the full embedded stack, from bare-metal firmware and RTOS integration to hardware bring-up and bench debugging. If you thrive on hard constraints, enjoy working close to the metal, and want your code to matter, read on. As a Senior Embedded Software Engineer, you will own software that runs directly on safety-critical avionics hardware including our main flight computers. You will work at the intersection of firmware, real-time systems, and hardware bring-up, and you will contribute to a team culture where everyone is expected to understand the system end to end. This is not a siloed firmware role: you will interact with engineers from a wide variety of disciplines on a daily basis, including systems engineering, controls, flight physics, power electronics, and aeromechanical. Embedded firmware for microcontrollers and SoCs in a bare-metal and/or RTOS environment (FreeRTOS, Zephyr, or similar) Driver development, peripheral integration, and board bring-up for custom hardware platforms Real-time control loops and sensor fusion pipelines where timing and determinism are non-negotiable Hardware debugging: oscilloscopes, logic analyzers, JTAG, and willingness to get comfortable with a schematic C++ and Python tooling for testing, scripting, and automation around embedded targets Development of models and emulators for aircraft components to ensure hardware behavior is faithfully represented in our cloud simulation framework You probably have: 5+ years of professional embedded software development, with production firmware shipped on real hardware Deep fluency in C and/or C++; Python for scripting and test tooling Hands-on experience with at least one RTOS and with bare-metal development Comfort reading schematics, using bench instruments, and debugging hardware/software integration issues at the signal level Experience with communications protocols: SPI, I2C, UART, CAN, Ethernet Strong opinions about code quality, testability, and the difference between software that works in the lab and software that works in the field It’s a bonus if you have: Experience in aerospace, defense, robotics, or other safety-critical domains Familiarity with DO-178, MISRA, or other embedded software standards Exposure to desktop tooling or visualization for hardware debug and test workflows Experience with CI/CD pipelines for embedded targets (HIL, SIL, emulation) Primary languages: C++ and Python RTOS: FreeRTOS and bare-metal depending on target Toolchains: GCC/Clang cross-compilers, CMake, custom build infrastructure Version control and CI: Git, GitHub, cloud-based batch simulation and test runners Modern AI coding tools used as productivity accelerators, not as a substitute for engineering judgment Elroy’s software team is small, senior, and exceptionally cross-functional. Most engineers here are comfortable working across embedded firmware, desktop tools, and cloud infrastructure. Not because we expect everyone to be an expert in everything, but because we value curiosity and adaptability over and above having all of the answers on day one. We're looking for someone who brings deep experience in embedded and real-time systems, and isn't afraid to range beyond that when the work calls for it.