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Sakana AI

Orchestrates multiple LLMs via API

UI/UX Designer - Defense

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

About the Job

Requirements

  • At least five years of practical UI/UX design experience in web or business application environments.
  • Practical experience in user interviews, work observation, and workshop design, and improving experiences using qualitative and quantitative data.
  • Experience designing interfaces and prototypes with Figma or Claude Design, and building and operating design systems.
  • Experience collaborating with project managers and engineers to define specifications and conduct design discussions.
  • Ability to explain design intent and decision rationale logically and present proposals clearly to customers, including service members, staff, and relevant departments.
  • Experience designing information-dense systems with complex business processes for B2B use, such as business systems, SaaS, dashboards, or monitoring and operations tools.
  • Ability to understand business processes structurally, define goals independently in ambiguous situations, identify and break down problems, and make them concrete for team decision-making.
  • Ability and initiative to use AI tools such as Claude Design, Figma Make, and Claude Code throughout design work to maximize deliverable quality and speed autonomously.
  • Business-level Japanese proficiency, including reading, writing, and verbal discussion for customer negotiations.
  • Interest in the defense and intelligence domain and motivation to continue acquiring knowledge independently.
  • High awareness of information security and willingness to cooperate with required suitability assessments and eligibility checks.
  • Japanese nationality is required for assignment to defense and intelligence projects, along with meeting information-security and suitability assessment standards.

Responsibilities

  • Lead design end to end for products in the defense and intelligence domain, from understanding work and designing experiences through validation, implementation, and post-deployment improvement.
  • Visit government ministries and agencies, units, bases, and garrisons; collect primary information through interviews with service members and staff and observation of their work within information-security constraints.
  • Visualize workflows, forms, existing systems, and decision-making processes, and structure where time is spent and decisions become bottlenecked.
  • Work with Defense Domain Experts and Forward Deployed Engineers to define personas, user journeys, and operational concepts.
  • Design workflows and screens for AI-supported tasks such as observation and reporting, information integration, analysis, and resource allocation.
  • Design interaction patterns that visualize AI uncertainty, confidence, data provenance, and agent processing, with human review, approval, and intervention built in.
  • Design experiences that help users notice and recover from hallucinations and errors.
  • Design information architecture, prioritization, status displays, and notifications so users can quickly reach necessary information under time pressure and high workloads.
  • Create testable prototypes beyond static mockups using Figma, Claude Design, and coding tools.
  • Conduct usability tests with field users and improve designs based on qualitative and quantitative feedback.
  • Design experience evaluation metrics alongside accuracy evaluations using domain-specific benchmarks.
  • Collaborate with software engineers and Forward Deployed Engineers on specifications, implementation reviews, and continuous improvement after release.
  • Work onsite in client environments for a period when needed.
  • Feed primary information gathered in the field into internal product and research themes, and share design knowledge internally.

Desired Qualifications

  • Experience designing business-support products or proof-of-concept projects using AI or large language models.
  • Experience designing interactions that account for AI non-determinism, uncertainty, explainability, and user oversight.
  • Experience designing interfaces for command-and-control systems, intelligence analysis tools, monitoring and operations centers (NOC/SOC), aviation, maritime, medical, or other domains where errors or misinterpretation can have serious consequences.
  • Work experience at Japan's Ministry of Defense or the Self-Defense Forces, or project experience with defense manufacturers, trading companies, or systems integrators serving government agencies.
  • Experience designing visualizations for maps and geospatial information, time-series data, or sensor data.
  • Experience designing products for offline, low-bandwidth, or closed-network environments.
  • Experience designing non-web clients such as Android mobile applications, embedded devices, automotive systems, or wearables.
  • Understanding of frontend implementation with React, Next.js, or TypeScript, or experience with rapid prototyping through vibe coding.
  • Experience launching products from zero to one or implementing consistent design across multiple products.
  • Experience leading product development in agile or lean UX environments.
  • Experience creating documents such as proposals, specifications, or screen definitions for government agencies.
  • Business-level English proficiency, beneficial for collaboration with the Research team.

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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