I have over 8 years of experience as a full-stack engineer, starting my career in UI/UX design. I am proficient in a wide range of development, from backend development using PHP (Laravel), Node.js, and Go, to frontend development using React and Next.js. I have designed, developed, and operated web systems for logistics, reservation systems, real estate management, and AI chatbots, and have experience with REST APIs, database design, and development using AWS and Docker. In recent years, I have focused on improving business efficiency and services through generative AI applications and recommendations using OpenAI APIs and LangChain. I value integrity and quality, and can communicate in English and Japanese.

渡邉 孝士郎

I have over 8 years of experience as a full-stack engineer, starting my career in UI/UX design. I am proficient in a wide range of development, from backend development using PHP (Laravel), Node.js, and Go, to frontend development using React and Next.js. I have designed, developed, and operated web systems for logistics, reservation systems, real estate management, and AI chatbots, and have experience with REST APIs, database design, and development using AWS and Docker. In recent years, I have focused on improving business efficiency and services through generative AI applications and recommendations using OpenAI APIs and LangChain. I value integrity and quality, and can communicate in English and Japanese.

Available to hire

I have over 8 years of experience as a full-stack engineer, starting my career in UI/UX design. I am proficient in a wide range of development, from backend development using PHP (Laravel), Node.js, and Go, to frontend development using React and Next.js.

I have designed, developed, and operated web systems for logistics, reservation systems, real estate management, and AI chatbots, and have experience with REST APIs, database design, and development using AWS and Docker. In recent years, I have focused on improving business efficiency and services through generative AI applications and recommendations using OpenAI APIs and LangChain. I value integrity and quality, and can communicate in English and Japanese.

See more

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
See more

Language

English
Advanced
Hindi
Advanced
Japanese
Fluent

Work Experience

フリーランス(Web系システム/AI関連の受託開発)
January 1, 2026 - Present
Web系システムおよびAI関連の受託開発に従事。要件に応じて設計・開発を行い、生成AIを含む実装支援や改善提案にも対応。
フリーランス(Web系・AI関連受託開発)
January 1, 2026 - Present
Web系システムおよびAI関連の受託開発に従事(業務内容はWeb/AIアプリケーションの設計・開発・実装・運用を想定)。OpenAI APIやLangChain等の生成AI活用を含む案件に対応している。
フルスタックエンジニア(フロント〜インフラ一貫担当) at Emstell Technologies
January 1, 2018 - December 1, 2025
フロントエンドからインフラまで一貫して担当。設計・開発・運用を通して、品質を重視したシステム開発を実施した。
AIエンジニア / AIチャットボット・AIアプリ開発 at Emstell Technologies
January 1, 2018 - December 1, 2025
AIチャットボットおよびAIアプリケーションの開発に従事。生成AIを活用した機能実装や業務向けのアプリケーション開発を行った。
Node.jsバックエンドエンジニア / API開発 at Emstell Technologies
January 1, 2018 - December 1, 2025
Node.jsを用いたAPI開発を担当。REST API設計・実装、外部連携、パフォーマンスや保守性を意識した開発を行った。
PHPエンジニア / Laravelバックエンド開発 at Emstell Technologies
January 1, 2018 - December 1, 2025
PHP(Laravel)を用いたバックエンド開発を担当。サーバーサイド実装、データ処理、API連携などを通じてWebサービスの基盤を構築した。
UI/UXデザイナー at Emstell Technologies
January 1, 2018 - December 1, 2025
Webアプリケーションの設計・開発に従事。UI/UXの観点から要件整理から実装までを一貫して担当し、ユーザビリティを重視した改善を行った。
フルスタックエンジニア at Emstell Technologies
January 1, 2018 - December 1, 2025
入社後、UI/UXデザイナー、PHP(Laravel)バックエンド、Node.jsによるAPI開発、AIエンジニアとしてAIチャットボット/AIアプリケーション開発まで幅広く担当。フロントエンドからバックエンド、インフラまで一貫して関与し、Webアプリケーションの設計・開発・運用を推進した。生成AI活用も含めた多様な要件に対応し、開発効率と品質の両面を意識した実装を行っている。

Education

ICSA Kuwait Web Development Course 修了 at ICSA Kuwait
January 1, 2017 - September 1, 2017
ICSA Web Development Course 修了 at ICSA Kuwait
January 1, 2017 - September 1, 2017

Qualifications

ICSA Kuwait Web Development Course 修了
January 1, 2017 - July 26, 2026
ICSA Kuwait Web Development Course 修了
January 1, 2017 - July 26, 2026

Industry Experience

Software & Internet, Education, Media & Entertainment, Professional Services, Computers & Electronics

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
See more