Legal Counsel
River AI
Legal Counsel
River AI
API for fine-tuning open-weight models
We are hiring for a Legal Counsel to be attorney #2 at River AI, an AI lab that is on a fast technological trajectory and that closed its first round of funding ($1.1 Billion) eight weeks after coming out of stealth. We are looking for a first-principles type of person who also loves to be an operator and to roll up their sleeves. Responsibilities will encompass commercial, product, corporate, employment, and all sorts of novel areas of law that come with frontier technologies. If you are the entrepreneurial type, this is your chance to jump in at a start-up!
We are a team that is genuinely interested in working smarter. You will have real room to deploy AI to take the repetitive or tedious tasks off your plate, so your time goes to meaningful work.
At River AI, our mission is to create personal AI owned and shaped by each individual. To achieve this, we are building the full stack required for people and organizations to create AI models of their own—from training infrastructure and open-weight model post-training to personal hardware and next-generation interfaces.
We are scientists, engineers, and builders from the industry’s leading technology companies and AI labs. Our team has experience scaling consumer products to hundreds of millions of users and building the infrastructure behind frontier AI systems.
River AI helps developers and enterprises train, fine-tune, and own custom open-weight AI models using its River API, which focuses on open-weight models rather than a single lab-owned general model. The API supports LoRA fine-tuning and reinforcement learning on frontier open weights, featuring fast weight transfers, sampling-training consistency, elastic compute, and token-based billing that avoids idle GPU charges. It differentiates itself by enabling true ownership and control of models, offering a full-stack solution for training, fine-tuning, and deploying custom models without relying on a centralized general model. Its goal is to empower individuals and organizations to own, customize, and run their own AI systems with close-to-the-user control.
Explore more opportunities at River AI