Spacecraft Descent Guidance, Navigation, and Control Software Engineer

ispace is looking for Spacecraft Descent Guidance, Navigation, and Control Software Engineer to join our growing team in Tokyo.    (Japanese follow English)   For this role, you will develop the Flight Software (FSW) of the Guidance, Navigation and Control functions for the Entry, Descent and Landing (EDL) phase of a lunar lander. Contribute to the development of the lunar lander simulator and testing framework as well as design, implement and validate GNC algorithms in coordination with Flight Software and GNC engineers.  You will also perform design analysis related to landing GNC and detailed design of GNC algorithms based on higher-level requirement and support flight software integration activities and mission operations and preparation activities.     Candidate profile :    If you are an experienced AOCS/GNC engineer with strong technical depth in spacecraft guidance, navigation, and control with 5+ years of hands‑on engineering experience, proven capability in 6DOF simulations, trajectory optimization, and the development of guidance, navigation, and attitude control algorithms. The candidate is proficient in C/C++, Python, Git, and modern software engineering practices, including clean code principles and unit testing. Candidate must excel in cross‑functional teamwork, communicate effectively, demonstrate a proactive and enthusiastic attitude, and operate comfortably in an English‑speaking engineering environment. This candidate can independently develop, analyze, an