ML Engineer: LLM Post-Training & Multi-Agent Systems

Perplexity is seeking an experienced Machine Learning Engineer to advance how AI systems search, reason, and collaborate to solve complex problems. We control the full stack from models to harnesses and search infrastructure, enabling new approaches across all three training models to improve retrieval and system reliability.

The role focuses on building and evaluating ML systems, including reinforcement learning for reasoning, and coordinating multi-agent setups to deliver measurable gains in