Founding Machine Learning Engineer

About the Role This is a founding ML engineering role at an early-stage AI startup, sitting at the intersection of post-training, agent systems, and research infrastructure. You will own the ML function from day one, working closely with the founding team to define technical direction, run experiments, and build the systems that power the next generation of AI agents. What You'll Do Structure, filter, and score experimental trajectories to build high-quality training data pipelines. Design and …