【年収~2500万円】LLM Scientist| Fast-Growing AI Solutions Company

We are currently partnering with a fast-growing AI & Data consulting company in Japan that is actively expanding its Generative AI and Large Language Model (LLM) division and is now looking for both LLM Scientists and Senior LLM Scientists.
*Please note that prior financial industry experience is NOT required.
*For foreign candidates, a valid Japanese work visa and at least JLPT N2-level Japanese (or equivalent business Japanese communication skills) are required to apply.
Position Levels
• Junior / Mid-Level: ¥6M – ¥10M JPY
• Senior Level: ¥10M – ¥25M JPY
The company works directly with major enterprise clients in Japan on cutting-edge AI transformation initiatives involving Generative AI, LLM applications, AI governance, intelligent automation, and next-generation enterprise AI ecosystems.
These positions offer the opportunity to work on real-world Generative AI implementation projects, including Retrieval-Augmented Generation (RAG), AI Agents, enterprise knowledge systems, AI-powered business process transformation, LLM evaluation frameworks, and production-grade AI applications.
The environment is highly collaborative and technology-driven, combining hands-on development, advanced AI implementation, and business-oriented consulting engagements.
Why Apply?
• Work on real-world LLM, RAG, and AI Agent projects
• Join a rapidly growing AI company with excellent career growth opportunities
• International and open-minded work environment
• English-friendly culture with multicultural teams
• Full flex-time and hybrid work style
• Direct exposure to large-scale enterprise AI initiatives
Key Responsibilities
• Design, develop, and evaluate enterprise-grade applications utilizing Large Language Models (LLMs)
• Develop and optimize prompts, workflows, and inference strategies for Generative AI solutions
• Build and support Retrieval-Augmented Generation (RAG) systems and AI Agent-based applications
• Participate in Generative AI proof-of-concepts (PoCs), implementation projects, and production deployments
• Collaborate with AI consultants, data scientists, and data engineers to translate business requirements into AI solutions
• Conduct technical validation, benchmarking, and evaluation of LLM-based systems
• Support AI governance, guardrails, model safety, and responsible AI initiatives
• Contribute to internal AI frameworks, reusable assets, and next-generation Generative AI capabilities
• Participate in enterprise AI transformation projects across multiple business domains
Examples of projects include:
• Enterprise knowledge search and RAG implementation initiatives
• Local/private LLM deployment and operational efficiency projects
• AI governance and guardrail validation initiatives
• Business process transformation through Generative AI and intelligent automation
• Legacy system modernization supported by Generative AI technologies
• AI Agent development and orchestration frameworks
• LLM evaluation and optimization projects
Interview Process: Only 2 Interviews Without Tests.
Required:
• Bachelor's degree or equivalent academic background in Computer Science, Machine Learning, Data Science, Mathematics, Statistics, Engineering, or related fields
• Approximately 1+ years of professional experience in AI, data science, machine learning, or related technical fields
• Experience developing applications utilizing Large Language Models (LLMs) through commercial cloud AI services or equivalent platforms
• Experience with prompt engineering, LLM integration, or Generative AI application development
• Business-level Japanese (JLPT N2 or equivalent)
• Living in Kanto Area
• If possible, English Skills but is not a must.
Compensation & Benefits:
• Annual salary: ¥6M – ¥25M JPY
• Location: Nihonbashi, Chuo-ku, Tokyo
• Hybrid work style available (office + remote work combination)
• Full flex-time system (no core time)
• Standard working hours: 8 hours/day
Benefits:
• Defined contribution pension plan
• Learning & self-development support
• Internal/external networking support budget
• Sports & wellness allowance
• Full annual health check support
• Full influenza vaccination support including dependents
• Full transportation reimbursement
• Relocation support (eligible employees)
• Childcare/babysitter support
• Business trip & training allowances
• Marriage / childbirth / condolence support system
Insurance:
• Health insurance
• Employee pension
• Employment insurance
• Workers’ compensation insurance
Additional Information:
• Flexible internal role mobility and career growth opportunities
This is an excellent opportunity for someone who wants to work at the intersection of enterprise AI, large-scale data architecture, and real business transformation within Japan’s financial industry

Work arrangement
Yes