Résumé
2025-11
Summary
Freelance engineer based in Tokyo, with 25+ years across contract development, a major web-production company, and independent work.
Career history: 2014– Freelance / 2001–2014 Development division, major web-production company / 1996–2001 Contract-development company.
About
A long career across a wide variety of projects lets me cover a broad range of technical fields. Even for unfamiliar technologies, I can investigate independently and share what I learn with the team. I usually take a tech-lead position — owning basic design, troubleshooting, and technical research.
Skills
- Frontend
- JavaScript, TypeScript, VueJS, Ionic, React, HTML, CSS, jQuery
- Backend
- PHP, Laravel, Fuel, Java, Kotlin, Spring Boot, MySQL, Postgres, Go, Python
- DevOps & Cloud
- Docker, Docker Compose, GitHub, Bitbucket, AWS (EC2, S3, Amplify, MediaLive, Elasticsearch, API Gateway, Route 53, CloudWatch, Lambda, CloudFront, DynamoDB, RDS, VPC, ALB, WAF, ECS, ECR, EKS, SQS, SNS, SES), Azure (App Service, Functions, Blob Storage, Queue Storage, Batch, Container Registry), Terraform
- Other tools
- Claude, Slack, Zoom, Skype, Backlog, JIRA, Google Drive
Certifications
- IPA Project Manager
- IPA IT Service Manager
- TOEIC 885
- MBA (Japan)
Project History
- 2025/10–Present
SVG Editor Development
Tech research, proposal, implementation
Built an SVG editing tool with React. A POC investigating how existing government-office form/report templates could be edited on the web as part of migrating those systems to the web.
Highlight Because requirements are defined while iterating on a working program, changes happen frequently; used AI-assisted coding to implement quickly.
Stack React / Claude Code / Python ・Team 1
- 2025/8–2025/10
Backend Environment for Multiple Web Applications
Requirements / design / implementation / infrastructure
Built a base system to provision AWS backend environments for multiple web apps as fast as possible. Other teams build the apps; their runtime environment can be provisioned almost at the push of a button.
Highlight Implemented advanced infrastructure — dynamically adding CI/CD pipelines and scaling ECS / API Gateway via CDK. Generating CDK from requirements with AI dramatically shortened the build period.
Stack Claude Code / Lambda / CDK / CodePipeline / GitHub / S3 / CloudWatch / API Gateway / ECS / RDS / SNS ・Team 3
- 2024/2–2025/7
Generative-AI Contact-Center Chat Service
Tech research / implementation / infrastructure
A chat service integrating ChatGPT, Bedrock, and Gemini to support inquiry handling and answer assistance for call centers.
Highlight An LLM project built fully serverless on AWS, with infrastructure entirely in CDK. Not a statistics/data-science specialist — the core work was building the environment and system to leverage LLMs.
Stack ChatGPT, Gemini, Bedrock / Lambda / CDK / Python / S3 / CloudWatch / CloudFront / API Gateway / ECS / Elasticsearch / RDS / Amplify ・Team 5
- 2025/1–2025/6
Government POC AWS Site Development
Tech research / sample program / infrastructure
A POC for an SI vendor that delivers systems to government offices — exploring how far a secure public-sector system can be realized on AWS/cloud.
Highlight Focused on investigation and sample-program creation, specializing in the technical side and feasibility. Documentation and internal coordination were handled by a separate SE.
Stack Lambda / CDK / S3 / CloudWatch / React / SES / Amplify / DynamoDB ・Team 2
- 2022/12–2024/1
Maintenance & Development for an IoT Service Operator
Tech research / sample program / infrastructure
A large-scale system monitoring 100,000+ IoT devices in real time. After a vendor change by the operating company, investigated the existing system and performed additional development.
Highlight Experienced a broad stack combining serverless (AWS IoT Core, Lambda, Golang) with server components (ECS, Laravel). The high device count demanded load-handling knowledge such as instance auto-scaling.
Stack Lambda / Serverless Framework / ECS / IoT Core / S3 / CloudWatch / PHP / Python / SQS / EC2 / ELB ・Team 8
- 2021/7–2022/11
Big-Data Analytics Environment
Tech research / sample program / infrastructure
Aggregated a major supermarket's sales (POS) data into a data warehouse. POS data periodically arrives in S3, is decomposed and reconstructed with Python & Airflow, and stored in Redshift.
Highlight The largest data volume in my career, yielding broad knowledge of handling large-scale data.
Stack Airflow / S3 / Redshift / Python ・Team 2
- 2021/10–2022/6
Internal Communication Network SaaS
Tech research / sample program / infrastructure
A web service providing an internal communication network as SaaS. Serverless + SPA + Ionic. Handled basic design and implementation approach, and lectured members on Amplify, Lambda, etc. with sample programs.
Highlight The requirement assumed a serverless configuration with Amplify; proposed an Amplify + Ionic serverless architecture.
Stack TypeScript / Ionic / AWS Amplify, AppSync, DynamoDB, Lambda, WAF, SES, S3 ・Team 7
- 2021/6–2021/10
Town-Information Search Service for a Real-Estate Company
Requirements / system architecture / sample program / infrastructure
New development of a web system to drive traffic to a real-estate company's property-search site by registering town information — shops and entertainment spots. As an early member, handled requirements, system architecture, sample-program creation, and lectured members on React.
Stack PHP / Laravel / TypeScript / React / AWS (EC2, RDS, S3) ・Team 6
- 2021/4–2021/6
Music Live-Streaming Site Migration
Tech research / migration program / environment migration
Vendor migration of an existing live-streaming site. Migrated the entire AWS environment to a new one without changing the program itself. An account transfer would normally suffice, but a full migration was performed for business reasons.
Highlight Codified the environment using Terraform.
Stack Terraform / AWS (EC2, CloudFront, ALB, Route 53, CloudWatch, Redis, RDS, S3) ・Team 1
- 2020/11–2021/3
EC Live-Commerce Site
Tech research / sample program / infrastructure
Built a site for an e-commerce company to sell products via live video. A receive-only app for end users via Ionic; broadcasting handled through a web site.
Highlight Serverless development with Amplify + Ionic; app delivery with Ionic; video delivery with AWS MediaLive.
Stack JavaScript / Ionic / AWS (Amplify, MediaLive, DynamoDB, AppSync, CloudWatch, S3) ・Team 6
- 2020/9–2020/11
Logistics Company Dispatch System
Tech research / programming / environment setup
Building a dispatch system for a logistics company. Did some Java implementation, but the main work was building the Azure development environment and establishing Docker container deployment.
Highlight Docker container deployment on Azure.
Stack Java / Spring Boot / Azure (App Service, Functions, Blob Storage, Queue Storage, Batch, Container Registry) / Docker / Docker Compose ・Team 10
- 2020/2–2020/9
Cram-School Referral Site
PL / SE / PG / Infrastructure
Built a portal site introducing students to cram schools. Originally developed in Ruby but interrupted for vendor reasons; took over development using PHP.
Highlight Analyzed Ruby/Rails code; address-to-latitude/longitude conversion using Google Maps.
Stack PHP / FuelPHP / VueJS / AWS (EC2, RDS, Elasticsearch, S3) ・Team 7
- 2014–2019
Overview (2014–2019)
PL / SE / PG / Infrastructure
Multiple projects delivered in a lead/development role:
- EC site for a foreign home-appliance maker (Japan market)
- Membership site for a funeral company
- Promotional site for an amusement-machine maker
- Dispatch service for a warehouse company
- EC site for the Chinese market
- Video-delivery site for the broadcasting industry
- EC site for a pet-food maker
Stack Kotlin / PHP / Laravel / FuelPHP / Zend FW / MySQL / Postgres / VueJS / jQuery / AWS (EC2, RDS)
- Before 2014
Overview (Before 2014)
PM / PL / SE / PG / Infrastructure / Bridge SE / Line manager
As a company employee, experienced the following:
- Multiple site-building projects using Java
- Multiple site-building projects using PHP
- Multiple PM / PL projects
- Multiple Bridge SE projects
- Development-division manager (2 years)
Stack Java / PHP / jQuery / MySQL / Postgres / Infrastructure (non-cloud)