The Embedded Software Engineer III designs and implements embedded software for satellite avionics and payload data processing systems, including real-time monitoring, power management, and Linux board support packages for flight applications. The role requires proficiency in C/C++ on embedded Linux and RTOS platforms, experience with ARM Cortex and RISC-V architectures, bootloader/kernel customization, and networking/security protocols (IP, TLS, IPsec). Responsibilities include interfacing with FPGA systems (Xilinx, Microsemi, Microchip, Vorago), cryptographic implementations, and close collaboration with hardware teams to deliver low-SWaP aerospace solutions. Candidates must have 5+ years of embedded software development and the ability to obtain a U.S. Security Clearance.