Yasushi Shimogaisho

AI Data Annotator / Web Developer / Translator

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Tama, Japan

Experience

Jul 2008 - Present
17 years 7 months
Japan

AI Data Annotator / Web Developer / Translator

Freelance

  • Contributed to 20+ diverse AI training projects across multiple global platforms, focusing on RLHF.
  • Performed expert-level evaluation of AI-generated code snippets in Python and JavaScript, ensuring functional correctness, security, and optimization.
  • Conducted rigorous Japanese-English linguistic comparisons and response rankings to enhance LLM natural language understanding and cultural nuance.
  • Maintained exceptional quality scores by strictly adhering to complex English technical guidelines and actively participating in webinars.
  • Executed specialized tasks including high-precision map labeling and Japanese speech transcription.
  • Successfully translated extensive technical and business documentation between English and Japanese.
  • Developed and maintain an interactive astrology web application using React/Next.js and Sanity CMS, demonstrating modern front-end architecture.
  • Scaled a WordPress-based travel information site to 1 million monthly page views through advanced SEO strategies and content management.
Apr 2003 - Jun 2008
5 years 3 months
Japan

Web Developer / Senior Software Engineer

Sion Ltd.

  • Renovated a web system for a major manufacturing company using a Java web application framework.
  • Renovated the e-commerce website of a major Japanese manufacturer using a Java web application framework.

Summary

A senior software engineer with over 25 years of experience, and a dedicated AI Data Trainer specializing in high-quality dataset creation for LLMs. Leveraging a deep background in Full-Stack development (React, Next.js, Python) to evaluate and refine AI-generated content. Proven track record in executing complex annotation tasks, including code debugging, linguistic response comparison, and multimodal labeling. Committed to data integrity and strict adherence to technical guidelines to improve model accuracy and safety.

Skills

  • Ai & Data Annotation: Rlhf, Prompt Engineering, Response Ranking, Multimodal Labeling, Transcription.
  • Coding Expertise: Python, Javascript/typescript, React/next.js, Sql, Swift, Java, Git, Object-oriented Programming.
  • Linguistic & Soft Skills: Attention To Detail, Complex Guideline Adherence.

Languages

Japanese
Native
English
Advanced
German
Elementary
French
Elementary

Education

The Open University of Japan

Bachelor of Arts, Liberal Arts / Nature And Environment · Liberal Arts / Nature And Environment · Chiba, Japan

Ehime University

Bachelor of Arts, English Language And Literature · English Language And Literature · Matsuyama, Japan

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