I'm a Software and Infrastructure developer with over 9+ years, and I've been leading some engineering teams in recent years.

Expert at AWS by using Server-less architecture.

Also a master of Server-side API and Batch with Python.

Additionally, experienced data science with Python and AWS.

I have lectured at AWS Summit Tokyo 19 with company booth.

Skills

AWS

Master
  • Lambda
  • ECS
  • DynamoDB
  • SQS
  • CloudWatch
  • Athena
  • S3
  • Glue
  • Terraform

Backend Develop

Master
  • FastAPI(Python)
  • Nest.js(TypeScript)
  • SpringBoot(Java)
  • Echo(Go)

Frontend Develop

Advanced
  • React.js
  • Next.js
  • Gatsby.js
  • Astro
  • Vue.js
  • Nuxt.js

Database

Advanced
  • MySQL
  • PostgreSQL
  • ClickHouse
  • Snowflake
  • Presto with Hadoop

Data Science

Intermediate
  • Jupyter notebook
  • Pandas
  • Scikit learn
  • R
  • Keras

Native App Develop

Beginner
  • Flutter
  • Android Java(WearOS)

Work Experience (8)

DevOps developer
KDDI
April 2016 - March 2017
https://www.kddi.com/

Developing and operating some location-based services by using on-premise servers.

Also develop integrated monitoring systems such as Zabbix.

  • Started the company

  • Integrate monitoring and operation system using by Zabbix and Expect

Project Manager
KDDI
April 2017 - September 2017
https://www.kddi.com/

I had many experiences such as project management, team building, and handling big data. Our team created the analytics operation system with Splunk and Hadoop(MapR) Used for the company's internal log.

  • Project management

  • Team building

  • Use Splunk

  • Hadoop(MapR)

DevOps developer
KDDI
October 2017 - March 2019
https://www.kddi.com/

Developing and Operating Web-based Chatbot services by using AWS and Python, Node.js.

The architecture is applied by AWS management services such as ECS with Docker, DynamoDB, Lambda, and S3.

Also, creating CI/CD pipelines using by Drone and automation tests using by Pytest.

  • First experience using AWS

  • First experience using Python and Node.js

  • Server-less architecture

  • Scrum development

Data Engineering developer
KDDI
April 2019 - Current
https://www.kddi.com/

Developing data analysis infrastructure using AWS because of analysis of the Chat-bot's conversations.

The architecture is followed by Data-lake architecture.

  • Data-lake Architecture using AWS

  • Server-less with Lambda Python

  • Pandas

  • Scrum development

Tech Lead
KDDI
April 2019 - July 2021
https://www.kddi.com/

Senior engineer and AWS tech Lead of developing Web-based and Native App Chat-bot services by using AWS and Python, Node.js.

The number of Team member is over 8-10, experienced only make architect, developing but also team management, solving difficult issues, and negotiating quite a few stakeholders.

  • My first experience of tech lead

  • The Architecture introduced at the AWS Summit

  • Scrum development

Development Group Leader
EventHub
August 2021 - January 2024
https://eventhub.jp/

Application engineer of developing Web-based event matching platform by using AWS, Nest.js + React with TypeScript.

  • Engaged in the full cycle of planning, requirement definition, development, QA, and operation as a full cycle engineer.

  • Formulate and execute missions and projects for the Product Infrastructure team as Development Manager.

  • Engaged in the development of a pseudo-live function for live delivery of pre-recorded videos as a video delivery platform/API infrastructure for external collaboration.

SRE Engineer
Michibiku
September 2022 - Current
https://michibiku.co.jp/

As an SRE Engineer, improved continuous development processes using CDK, GitHub Actions, and Autify.

  • Joined as SRE engineer to build and improve CI/CD pipeline/infrastructure (AWS).

  • Migration of services built on EC2 to ECS/Fargate while building Blue/Green deployment mechanism.

  • Expansion of automated testing using Autify and development of execution pipeline to improve efficiency of QA operations.

LLM App developer & Tech Lead
KDDI Agile Development Center
February 2024 - Current
https://kddi-agile.com/

I develop AI agent applications leveraging generative AI technologies.

  • Currently serving as the development lead for "A-BOSS" an AI agent created specifically for sales organizations.

Projects (3)

The chat-bot service for customer support(Web)
March 2016 - September 2018
https://www.au.com/support/inquiry/message/
  • AWS
  • Python
  • Elasticsearch
  • A chat-bot in Web page

  • Hybrid arch with chat-bot and human operators

  • Use Elasticsearch for FAQ search engine

The chatbot service for customer support(Native Apps)
October 2018 - March 2022
https://www.au.com/support/inquiry/message/
  • AWS
  • Node.js
  • Python
  • A chatbot in Native App

  • Hybrid arch with chatbot and human operators

  • Featured at AWS Summit Tokyo

A-BOSS (AI Business Department Manager)
July 2024 - Current
https://www.youtube.com/watch?v=qxUbeFSupAc
  • Amazon Bedrock
  • LLMOps
  • Generative AI
  • AI Agent
  • Sales Support System
  • Developed an AI agent that provides department manager-level guidance to sales teams

  • Implemented Amazon Bedrock with Agentic Workflow architecture

  • Created a production-grade LLMOps system with continuous learning capabilities

  • Integrated with existing sales support systems for seamless workflow

  • Featured in KDDI's official corporate communications

Education (3)

Bachelor
Department of education
Waseda University
2012 - 2016
  • Social education
  • Educational psychology
  • Education within enterprise
Grade: 3.4
Sub-major
Software engineering (Sub-major)
Waseda University
2012 - 2016
  • Javascript
  • C++
  • Ruby
  • VisualBasic
  • Java
  • Unix/Linux
  • UML/Design Pattern
  • Multimedia(Adobe PhotoShop/AfterEffects/Premier)
Sub-major
Data analysis (Sub-major)
Waseda University
2012 - 2016
  • Database(MySQL, Oracle)
  • R
  • Multivariate analysis
  • Social statistics

Awards

Award of technology quality improvement annually
KDDI
2019

Stable and flexible system design utilizing AWS and successfully responded to large-scale traffic without problems.

Publications

KAG Tech Book -Vol1- in KAG
30 May 2025

This book was written by volunteers from KDDI Agile Development Center, Inc. Each of them brought their experiences and knowledge gained while working on different sites and products, and compiled their practices and learnings as a team into a single book.As a result, the content of this book is not limited to a single point of view, but is a mixture of various approaches and ways of thinking. We would be more than happy if any of the chapters could be a hint for the challenges you are facing now or will be tackling in the future.

やさしいMCP入門 in 秀和システム
1 July 2025

AIエージェント時代の標準規格MCP(モデル コンテキスト プロトコル)の入門書。大バズりしたスライド「やさしいMCP入門」の著者が新技術の基礎をやさしく解説。

Languages

Japanese

Native Speaker

English

Intermediate

Interests

Photograph

  • Take photos in metropolis night view
  • Take photos in Nature

Music

  • Original music

Sports

  • Watching Baseball
  • Playing Table-tennis