【Full Remote 年収 1500万円】Applied Research Engineer（AI Agent Research & Development / Client Implementation）

One of the leading AI companies we work closely with is looking for an Applied Research Engineer (AI Agents / Generative AI) to drive the research, development, evaluation, and real-world implementation of advanced AI agents for enterprise customers.

The company develops proprietary Japanese-language LLMs and enterprise AI solutions utilizing advanced technologies such as Agentic RAG, Agentic OCR, Deep Research, and Knowledge Graphs. Its solutions have already been implemented by more than 300 companies, including major enterprises.

In this position, you will bridge cutting-edge AI research and real-world business applications, transforming research findings and prototypes into production-ready AI agents that deliver measurable value to enterprise customers.

You will take ownership of the entire AI development lifecycle, from initial Proof of Concept (PoC) and technical validation through AI agent architecture design, implementation, evaluation, and continuous product improvement.

This is a highly technical and research-oriented engineering role combining Applied AI Research, Generative AI development, AI agent optimization, and enterprise implementation.

This is a Full Remote position from anywhere in Japan with salary up to ¥15,000,000.

Job Responsibilities
・Research, develop, and enhance advanced AI agents utilizing LLMs, RAG, and related AI technologies
・Design and improve core AI agent logic, architectures, and workflows
・Design and execute PoCs to validate research findings and evaluate their practical business applications
・Develop and implement AI agent solutions tailored to enterprise customer requirements
・Design evaluation frameworks and continuous improvement processes for production AI agents
・Conduct accuracy evaluations, benchmarking, prompt optimization, and workflow improvements
・Translate customer business challenges into technical requirements in collaboration with Product Managers and consultants
・Lead technical decision-making through experimentation, validation, and hands-on implementation
・Collaborate closely with AI/NLP researchers, engineers, Product Managers, and consultants
・Apply insights gained from experiments and customer implementations to improve AI products and future research initiatives

Development Environment
Python / TypeScript / Docker / Terraform / AWS / Azure / Google Cloud
AI Technologies: LLMs / Agentic RAG / Agentic OCR / Deep Research / Knowledge Graphs / AI Agents


About the Company
The company is a Japan-based AI technology company with strong expertise in Generative AI and LLM technologies.

Rather than simply utilizing external AI models, the company has the technical capabilities to develop large-scale Japanese-language LLMs in-house and focuses on implementing AI solutions tailored to complex enterprise business environments.

Its solutions have already been implemented by more than 300 companies, including major enterprises, and the organization currently has approximately 150 employees.

In 2024, the company raised ¥4.5 billion in funding, bringing its total funding to approximately ¥8.8 billion.


Why Join This Role?
・Work at the intersection of cutting-edge AI research and real-world enterprise applications
・Transform advanced AI/NLP research into production-ready AI agents that deliver tangible business value
・Develop and optimize AI agents using technologies such as Agentic RAG, Agentic OCR, Deep Research, and Knowledge Graphs
・Take ownership of the entire development lifecycle, from PoC and technical validation to production implementation and continuous improvement
・Work directly with enterprise customers to understand business challenges and develop innovative AI solutions
・Collaborate closely with leading AI/NLP researchers and experienced engineering teams
・Explore technically challenging AI problems involving advanced reasoning, statistical modeling, and agent optimization
・Contribute to research publications and academic conferences when relevant to project outcomes
・Join a newly established engineering function connecting AI research with product development, with opportunities to shape technical direction and development processes
・Work fully remotely from anywhere in Japan

Requirements

Required

・Research experience in AI, Natural Language Processing (NLP), or Machine Learning, including academic or industry research

・Knowledge of and hands-on development experience with Generative AI technologies, including LLMs, RAG, or AI agents

・Strong Python programming skills, with the ability to independently conduct experiments, evaluate results, and develop prototypes

・Ability to evaluate technical validation results from both product development and business value perspectives

・Ability to translate experimental findings into actionable technical improvements and product development decisions

・Ability to reside in Japan

Preferred

・Experience designing, developing, or evaluating LLM-based AI agents and agent workflows

・Experience developing AI evaluation frameworks, benchmarking systems, or accuracy evaluation processes

・Experience leading customer-facing PoC projects or applied AI research and development initiatives

・Experience commercializing research outcomes or integrating advanced AI technologies into production products

・Knowledge of statistical modeling, Bayesian inference, or probabilistic modeling

・Experience publishing or presenting research at international conferences, academic journals, or domestic research conferences

・Experience working in corporate R&D organizations, AI startups, or research-driven product development environments

Ideal

・Passionate about combining advanced AI research with practical business applications

・Strong ownership and ability to independently drive research, experimentation, and implementation

・Ability to bridge academic research, engineering, and enterprise business requirements

・Strong analytical thinking, problem-solving, and technical decision-making skills

・Comfortable working with evolving requirements and developing solutions through hypothesis-driven experimentation

・Interested in collaborating with researchers, engineers, and enterprise customers to develop innovative AI products

Benefits

Compensation

Expected Annual Salary:

¥8,004,000 - ¥15,000,000

Salary Review:

Twice a year

Location

Tokyo / Full Remote Work Available Within Japan

Working Style

・Primarily full remote

・Work from anywhere within Japan regardless of region

・Flexible combination of remote and office-based work

・Flex-time system

・Core hours: 10:00 - 14:00

Holidays & Leave

・123 annual holidays

・Five-day workweek (Saturdays, Sundays, and national holidays off)

・Year-end and New Year holidays

・Paid annual leave

・Maternity leave

・Childcare leave

Benefits

・Full social insurance coverage

・Corporate defined contribution pension plan

・Up to ¥240,000 per year in financial support for professional development and AI-related activities

・Transportation expenses

・Regular health checkups

・Influenza vaccinations

・Company-provided PC (MacBook Pro)

・Five-day onboarding program after joining

・Opportunities for technical knowledge sharing and collaboration with AI researchers and engineers

Salary: 800万円〜1500万円