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River AI

API for fine-tuning open-weight models

Operations Lead

Business OperationsConfirmed live in the last 24 hours
Full-timePalo Alto, CA, USA

About the Job

Requirements

  • Significant experience in operations, strategy, program management, chief of staff, consulting, or a similarly high-ownership role.
  • Experience operating in a fast-paced startup or high-growth technology environment.
  • Ability to assess situations quickly and determine a practical path forward.
  • Comfort with significant ambiguity and ability to create structure where none exists.
  • Ability to build relationships and alignment across teams.
  • Written and verbal communication skills to distill complexity into clear decisions and actions.
  • High agency, strong ownership, and a bias toward action.
  • Comfort moving between strategic thinking and hands-on execution.
  • Strong data fluency and technical curiosity.
  • Fluency with modern AI technologies and tools, including large language models, agents, and AI-powered productivity.
  • Ability to use AI effectively to accelerate research, analysis, decision-making, automation, and execution.

Responsibilities

  • Partner directly across the founding team on the company’s highest-priority problems and initiatives.
  • Take ambiguity from identifying what is happening, to deciding what should be done, to planning and executing how to make it happen.
  • Build connectivity across research, engineering, product, hardware, go-to-market, legal, human resources, finance, information technology, and security, ensuring teams have the context and clarity needed to move quickly.
  • Establish low-friction operating mechanisms that improve decision-making, communication, and execution as the company scales.
  • Serve as a trusted thought partner by providing clear analysis, sound judgment, and actionable recommendations.
  • Anticipate needs, connect dots across the organization, and surface opportunities, risks, and dependencies that may not be visible within a single function.
  • Leverage AI tools to research, analyze, synthesize, automate, and execute faster.
  • Drive important work forward through execution.

Desired Qualifications

  • Experience working closely with founders or executive leadership at a high-growth technology company.
  • Experience in AI, machine learning, developer infrastructure, hardware, or another highly technical environment.

About the Company

River AI

API for fine-tuning open-weight models

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.

Company size
11-50
Company stage
Early VC
Total funding
$1.1B
Headquarters
Palo Alto, CA
Founded
2026

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