Member of Technical Staff — Training

About the Role RadixArk is seeking a Member of Technical Staff — Training to build and scale the systems that train frontier AI models. You will work on large-scale distributed training infrastructure for LLMs and generative models, pushing the limits of scale, efficiency, accuracy and reliability across 10k, or 100k+ of GPUs. This role sits at the intersection of ML, systems, and performance engineering. Your work will directly impact how next-generation AI models are trained and scaled. This is a deeply technical, high-impact role for engineers who enjoy solving hard systems problems at extr