Build the operating system for intelligent, empathetic AI companions. We’re designing the core runtime that lets AI companions perceive, reason, remember, and act. As our Founding Engineer, you’ll co-own architecture and ship v1s that become the backbone of the product. What you’ll do Design and build Python backend services and APIs powering real-time AI companion behavior. Define core system architecture: process boundaries, state management, storage, orchestration, and reliability. Move fast on 0→1 features; prototype, test with users, iterate. Own the full lifecycle: design docs, imp...