About

Upstage focuses on solving business problems using AI technology. With the mission of “Building intelligence for the future of work,” the company goes beyond simple task automation to develop AI solutions that enhance productivity through complex decision-making support. Through this, Upstage aims to revolutionize workflows and help businesses grow more efficiently.

We are dedicated to delivering “easy-to-apply AI solutions” so that everyone can benefit from AI technology. It has launched a series of APIs that enable businesses to easily utilize world-class AI models across various fields, contributing to their success. By optimizing LLM (Large Language Model) technologies for business environments, Upstage provides Private LLM services that improve work efficiency and productivity, striving to ensure AI is used beneficially in society. Similarly, Upstage Document AI is a product built on world-class OCR and information extraction technologies, aiming to automate and streamline tedious document processing through AI.

Upstage is building one of the global most powerful multilingual Large Language Models (LLMs) and enterprise-ready GenAI products including Document AI. In Japan, we are expanding into key industries such as finance, insurance, manufacturing, and healthcare through a direct and partner-led GTM strategy.

As a Solutions Architect Lead, you will lead the architecture, implementation, and scale-up of Upstage’s GenAI offerings in Japan. You’ll collaborate with the global product and sales teams, as well as local partners and enterprise customers, to deliver impactful LLM, Document AI, and RAG-based solutions.

Key Responsibilities:

• Design and implement GenAI architectures using Upstage’s LLMs, RAG pipelines, and Document AI APIs

• Lead PoCs including fine-tuning, vector DB integration, OCR pipelines, and secure API deployment

• Guide SI/ISV/distributor partners through onboarding, training, and solution co-design

• Translate customer needs into scalable architecture patterns with the global product and sales teams

• Act as Japan’s technical voice in global product and engineering discussions

• Represent Upstage at customer briefings, industry events, and technical workshops

Terms and conditions of employment:

• Full-time  (or Contract-based)

• Location: Japan (Remote or Hybrid)

•  Team: Upstage Japan GTM team

Minimum Qualifications

• 5–10+ years of experience in cloud-based AI/ML architecture or solution engineering

• Customer-facing experience with LLMs (fine-tuning, prompt engineering, inference optimization)

• Familiarity with RAG and vector search-based architectures

• Strong proficiency in Python and PyTorch (TensorFlow optional)

• Native-level Japanese and business-level English

Preferred Qualifications

• Experience deploying GenAI in regulated industries (finance, insurance, healthcare)

• Experience with AWS, Azure, or GCP deployments including CI/CD and security best practices

• Technical leadership working with SIers, ISVs, or CSPs

• MLOps, observability, and production performance tuning

• Technical writing and presentation skills for enterprise and developer audiences

Additional Information:

• For any inquiries, please contact us at joinstage@upstage.ai.

• Please upload all submission materials, including your CV, in PDF format.

• Ensure sensitive information (e.g., salary details, resident registration numbers) and unique identification numbers are not included in your resume.