coreflow

Define trust and safety problems and determine what content and behavior models should detect.Work with labelers to create data for moderation models.Train, evaluate, and deploy classifiers and LLM-based models on self-hosted GPUs.Own model accuracy, latency, and cost across millions of images and messages per day.Build image and chat moderation systems for prohibited content and re

Own model development for a product area from data and training through evaluation, deployment, measurement, and ongoing improvement.Fine-tune chat models using real conversation data and build evaluation systems for quality.Evaluate, optimize, and deploy image and video models on self-hosted GPUs, improving cost, speed, and quality.Investigate and build real-time AI experiences and

Own a customer-facing product area end to end, from understanding user needs and deciding what to build through shipping, measurement, and iteration.Build frontend and backend systems and determine how products run on GPUs at scale.Design systems for AI-character memory, including writing, ranking, and retrieval across billions of messages within context limits.Own feed retrieval, r