Lead Real-Time Multimodal AI Scientist

Amazon is seeking a Principal Applied Scientist to drive research and development of real-time multimodal conversational AI in Sunnyvale, CA. You will advance foundation models for speech and audio and shape post-training systems (reward modeling and reinforcement learning) for natural, human-like interactions.

You will set technical direction across the full model lifecycle—from pre-training and architecture design to RL alignment and real-time deployment—collaborating with inference engineers