Staff ML Engineer: AI Security & Guardrails

Reddit, Inc. is seeking a founding Staff Machine Learning Engineer to lead the development, training, and optimization of models for AI security at Reddit. This strategic, hands‑on IC role combines ownership of model architecture, training data, and experimentation with technical leadership across teams. You will help Reddit deliver stronger AI protections while preserving a high‑quality product experience, mentoring engineers and shaping long‑term ML capabilities and AI security direction.