【Full Remote】Bilingual Data Scientist｜海外リモート可（最長6ヶ月）【大手プライム上場】

Job Description

One of our top clients, a well-established company listed on the Tokyo Stock Exchange, is currently looking for a Data Scientist to join their growing data organization.

About the Company

A Japan-listed company on the TSE Prime Market and certified as a "White 500 Excellent Health and Productivity Management Corporation," offering a wide range of services to diverse customers, primarily focused on mobile content such as health information sites for women and music distribution platforms. The company's services span various fields, including "Healthcare," "Fintech," "Music, Video, Books," "Lifestyle Information," "Entertainment," and enterprise DX solution services.

A few years ago, to support its core business in Japan, the company established an offshore development center in Vietnam. Over time, this center has grown to become one of the top 3 IT development companies in the country. Leveraging the expertise and know-how gained from this successful venture, the company expanded its business to provide consulting services in DX software development, focusing primarily on large enterprises across the Asia region.

About the Job

Originally built on a strong foundation of consumer-facing digital services, the company has successfully expanded into high-impact domains such as Healthcare and Education (DX), addressing real societal challenges through technology. With a stable business base and continuous growth, they are now heavily investing in building advanced data capabilities to support analytics, machine learning, and data-driven decision-making across the organization.

This position offers the opportunity to work closely with cross-functional teams including Product, Engineering, and Business, delivering actionable insights while contributing to the development of scalable and reliable data infrastructure.

You will be part of a collaborative and international environment, playing a key role in shaping data-driven strategies and driving meaningful impact both at a business and societal level.

About the Role

We are looking for a Data Scientist to support large-scale data analysis, evaluate product and program performance, and enable data-driven decision-making across the organization.

In this role, you will work closely with Product, Engineering, and Business teams to deliver actionable insights while also contributing to the development of reliable internal data infrastructure.

Why Apply:

• Global Environment: Work closely with both a leading Japanese company and its Vietnam-based subsidiary, one of the top IT development companies in the country
• Flexible Remote Work: Fully remote within Japan, with the option for international employees to work up to 6 months from their home country
• Top-Tier Company: Join one of Japan’s recognized “White Companies,” known for strong work-life balance and employee-friendly culture

Responsibilities

Product & User Analytics

• Analyze user behavior and engagement trends
• Design metrics and analytical frameworks to evaluate feature performance
• Perform user segmentation and comparative analysis to support decision-making
• Create dashboards, reports, and concise presentation materials

Machine Learning & LLM (Large Language Models)

• Develop and deploy models for prediction and segmentation
• Build feature pipelines and implement model monitoring (performance, drift, data consistency)
• Apply LLMs to real-world workflows (prompt design, tool usage, orchestration)
• Drive LLM adaptation (fine-tuning, RAG, instruction tuning) and evaluation (accuracy, robustness, bias/safety)
• Clearly communicate assumptions, constraints, and results to stakeholders

Data Integration & Analytics

• Build and document integrated datasets from multiple data sources
• Establish consistent metric definitions and reporting standards (with strong focus on documentation and data catalogs)
• Collaborate with data engineers on data structures, tracking, and standardization
• Promote best practices in data governance and reproducible analytics

Requirements

Must-have Skills

• Advanced SQL skills and experience with large-scale data warehouses (e.g., BigQuery, Snowflake, Redshift)
• Proficiency in Python or R for data analysis and manipulation
• Strong understanding of statistics, experimental design, and trend analysis
• Ability to translate ambiguous or broad questions into structured analytical approaches
• Ability to work independently, validate assumptions, propose next steps, and lead analytical efforts within projects
• Strong written and verbal communication skills

Preferred Skills

• Experience with BI tools (e.g., Looker, Tableau, Power BI)
• Experience in data integration, metric standardization, documentation, and data catalog development
• Hands-on experience across the LLM lifecycle
• (model selection, fine-tuning/adaptation, prompt design, evaluation, deployment, monitoring, etc.)

Language Requirements

• English: Ability to use English as the primary working language, and independently engage in technical discussions and complex problem-solving with multinational teams (native level not required, but high fluency expected)
• Japanese: Business-level proficiency, with the ability to communicate effectively with domestic stakeholders, explain technical concepts clearly, and facilitate smooth alignment

Benefits

Benefits Employment Type: Full-time

Working Hours: Flextime system (no core time)

Work Style: Fully remote

Salary and Conditions: Up to 7 million yen