Software Lead Engineer - Space Simulation (Space Domain)

We are building a high-fidelity software platform for space. The system spans a high-performance physics simulation engine, a scientific data pipeline, a REST and event-streaming backend, and a native desktop client with 3D rendering. This is not an architecture-only role. The Principal Software Engineer is the final technical authority and is expected to be hands-on across all layers — writing simulation code, designing data interfaces, making HPC infrastructure decisions, and being the person who can sit down, open an editor, and solve the hard problem anywhere in the system. You will own the architecture, make and document the decisions that stick, and be directly accountable for correct implementation across the team. What You Will Actually Do Own the end-to-end software architecture a