Research Engineer / Research Scientist

River AI is creating personal AI owned and shaped by each individual through personal hardware, bespoke training infrastructure, next-generation UIs, and frontier deep learning research. The Research Engineer / Research Scientist will design and train foundation models for reasoning, multimodal understanding, continual learning, personalization, and efficient local inference, while owning the research lifecycle from algorithm ideation through scaled implementation.

Responsibilities:

• Design, train, and evaluate novel foundation models optimized for reasoning, multimodal understanding, and extreme personalization
• Pioneer research in continual learning, enabling models to adapt in real-time based on local user interaction without catastrophic forgetting
• Develop advanced techniques for data efficiency, alignment (e.g., RLHF), and parameter-efficient fine-tuning (PEFT) targeting our bespoke personal hardware
• Partner directly with the infrastructure team to rapidly scale and unblock experimental architectures across large compute clusters