Full stack engineer

About The Role RadixArk is building the infrastructure layer for frontier AI systems - unified inference, training, and evaluation stacks powering next-generation LLM applications at scale. Our platform integrates high-performance model serving, RL pipelines, and large-scale distributed systems across GPUs, TPUs, and emerging accelerators. We work at the intersection of systems engineering, AI research, and developer experience. We are looking for a world-class Full Stack Engineer who thrives in high-ambiguity environments and wants to build foundational tools for the next decade of AI. Requirements Technical Excellence 4 years of professional full stack engineering experience Based in Palo Alto, CA (Hybrid) / Remote (U.S.) Deep experience in: Frontend: React / Next.js / TypeScript Backend: Python (FastAPI / Django) or Node.js RESTful and/or gRPC API design Strong understanding of distributed systems concepts Experience building systems that handle real-time streaming or high-throughpu...