Hi there 👋 I'm Seito in Japan, a Web developer and a tech YouTuber!
I've worked in Japan and the Philippines.
I'm always looking for a challenging opportunity to work as a Web developer.

Index

• History
• Skills
• Private Projects
• Writings
• etc

• Period: Jun 2021 – Present
• Role: CEO and Web Developer

• Period: May 2016 – May 2021
• Role: President and VPoE

• Period: Sep 2012 – Apr 2016
• Role: Front-end Developer and Project Manager

• Period: Sep 2021 - Present
• Major: Master of Science in Decision Analysis

• Period: Dec 2020 ~ Present
• URL: https://www.youtube.com/channel/UC8IWoNfegB72Q2nT9GJy2zQ
• Role: Tech YouTuber
• Achievements:
  • Achieved 100,000 subscribers about three years after its launch

• Period: May 2016 ~ May 2021
• URL: https://cody.inc/
• Role: President, VPoE
• Achievements:
  • Built a new branch office alone in the Philippines as an entrepreneur and built the development team from scratch, reaching 90 members within 3.5 years
  • Achieved a surplus every year and increased annual revenues from ¥10 million to ¥250 million within three years with the cross-functional team

• Category: Web Application for a company operation
• Period: Jun 2022 ~ Present
• URL: Private
• Role: Web developer
• Achievements:
  • Replaced approximately 60% of operations previously performed by tech leads and CTOs with general employees.
• Used technology: TypeScript(Next.js), Jest, GraphQL, Vercel, Python(DRF), Docker, NGINX, AWS (EC2, IAM)

• Category: Web Application for managing membership and franchisees in Coworking business
• Period: Apr 2019 ~ Mar 2021
• URL: https://e-office.space
• Role: Project Manager
• Achievements:
  • Served as a bridge between the Philippines and Japan and between the sales and development teams and led the agile development with a cross-functional team of about 15 people.
  • Managed the project from release to stable operation while reducing development costs to 1/3 of the original price.
• Used technology: JavaScript(jQuery, Webpack), HTML, CSS, PHP(Laravel), Docker, AWS

• Category: Website for a photo studio company
• Period: May 2016 ~ Nov 2016
• URL: https://studio-home.jp
• Role: Frontend Engineer
• Achievements: Awarded in DFA
• Features: Implemented various animations on all pages using Canvas, SVG, CSS Animation, etc.
• Used technology: JavaScript(jQuery, Snap.svg, Canvas, gulp), HTML, CSS, PHP(WordPress)

• Management
• Human Recruitment
• Producing Co-working space
• Organizing events & developer's community
• Trainer for development
• Developing Web site & application software
• Technical direction

• JavaScript and TypeScript (React, Next.js, Node.js, jQuery)
• HTML and CSS

• Python (DRF)
• SQL(MySQL, PostgreSQL)
• AWS(EC2, Cognito, CLI)
• Docker
• Test tools (Jest, Storybook, Selenium)
• PHP, WordPress

• PHP (Laravel)
• GraphQL
• Vue.js
• R
• Flutter
• Firebase (Firestore, CLI)

• URL: Apple Store
• Overview: HTML Cards is a mobile education app for junior coding learners.
• Used technology: Flutter with Dart and SQLite
• Achievement: Totally over 10,000 downloads

• URL: Apple Store
• Overview: The Simplest Timer is a mobile app for students and athletes.
• Used technology: Flutter with Dart and Firebase(Firestore)

• Now writing...
  • Will be pushed about the efficient way how to learn coding in 2024
• The Best Practice of CSS Architecture
  • Published the book about the CSS architecture in 2015.