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Sakana AI

Orchestrates multiple LLMs via API

UI/UX Designer - Enterprise

Product DesignConfirmed live in the last 24 hours
Full-timeMinato City, Tokyo, JapanNo salary listed

About the Job

Requirements

  • Professional experience in UI design and UX design for web or business applications, expected to be at least five years.
  • Practical research experience such as user interviews, workflow observation, and workshop design, along with experience improving designs based on qualitative and quantitative data.
  • Experience designing interfaces and prototypes using Figma and Claude Design or similar tools, and operating design systems.
  • Experience collaborating with product managers and engineers on specification development and design discussions.
  • Structured understanding of user behavior and business processes, and the ability to translate problems into design.
  • Business-level Japanese proficiency, including reading, writing, and oral discussion.

Responsibilities

  • Lead end-to-end UX research, UI design, and design-system operations for Sakana AI's enterprise solutions, connecting user experience with business value.
  • Design and implement user experiences for enterprise-specific solutions by understanding the characteristics of target business operations and domains, creating practical and scalable interfaces.
  • Work with engineers, researchers, and clients in the business development organization throughout research, design, prototyping, and design-system development and operation, supporting products from launch through growth.

Desired Qualifications

  • Design experience on business-support products or proof-of-concept projects using AI or large language models.
  • UI design experience involving complex use cases, such as software as a service or business systems.
  • Experience launching products from zero to one, or implementing consistent design across multiple products.
  • Experience leading product development in an agile or lean user-experience environment.

About the Company

Sakana AI

Orchestrates multiple LLMs via API

Sakana AI builds AI foundation models and a multi-agent orchestration platform. Its flagship product, Sakana Fugu, runs as a single language-model interface that plans, delegates to, and combines outputs from a swappable pool of LLMs—including closed frontier models, open models, and its own instances—behind an OpenAI-compatible API. Fugu comes in two flavors: a low-latency everyday model and Fugu Ultra for tackling tough, multi-step tasks in software engineering, scientific research, and cybersecurity. The company differentiates itself by treating orchestration as a core capability to hedge against vendor lock-in and export-control shifts, using techniques like evolutionary model merging and agentic research systems. Sakana aims to provide reliable, flexible AI tooling for developers and enterprises through its API and tool integrations, while continuing to publish research on learned model orchestration.

Company size
201-500
Company stage
Series B
Total funding
$365M
Headquarters
Tokyo, Japan
Founded
2023

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