Kazumasa Komatsu

Full-stack Web Engineer

About Me

I am a web engineer with experience in both frontend and backend development. I have worked with modern JavaScript and cloud environments.

I continuously improve my skills through personal projects in my spare time.

Projects

  • Auto Writing

    Generate entire books from a Markdown table of contents using OpenAI API (ChatGPT).

    Express.js(TS)PostgreSQLReact(TS)Prisma(ORM)REST APIOpenAI APIStyled-components
    GitHub

  • Markdown Viewer

    A simple and dynamic Markdown-based blog viewer. This app automatically reads a local Markdown folder structure and displays it on a collapsible sidebar. It also supports GitHub-style Markdown features.

    Next.js(TS)PlaywrightTailwindCSS
    GitHub

  • Cost Management

    Cost management app. Manage your cost, expenses, and fee for food, transportation, entertainment, etc.

    React(TS)Spring Boot(Java)MySQLDockerStyled-componentsUbuntu
    GitHubDemo

  • Quiz App

    Users add questions and audio. And then users can take mock exam.

    React(TS)ReduxSpring Boot(Java)MySQLDockerTailwindCSSUbuntu
    GitHubDemo

  • Password Generator API

    This project is a simple API that generates and returns passwords. I use `K3s` in this project to learn Kubernetes concepts.

    GoK3sUbuntu
    MoreDemo

Client-like Project（Personal Network）

  • Pleasant Life

    A/C Installation Service Website I developed a responsive website for an air conditioning installation service

    React(TS)ReduxStyled-componentsUbuntu
    Website

Key Udemy Courses Completed

  • DSA + LEETCODE for Coding Interviews — Clear, Step-by-Step Animated Walkthroughs!
    Visit Udemy

    Java Data Structures & Algorithms + LEETCODE Exercises

    JavaData StructuresAlgorithms
  • Visit Udemy

    Web Development Fundamentals for Those Who Seriously Want to Learn [PHP, MySQL, Apache] (Backend Edition)

    PHPMySQL
  • JavaScript Mechanisms for Those Who Seriously Want to Learn [JS]
    Visit Udemy

    JavaScript Mechanisms for Those Who Seriously Want to Learn [JS]

    JavaScript
  • Complete Beginner’s Guide to React (v18): Hooks, Next.js 14, Redux, and TypeScript
    Visit Udemy

    Complete Beginner’s Guide to React (v18): Hooks, Next.js 14, Redux, and TypeScript

    JavaScriptReactTypeScriptNext.js

Now Learning

  • Java Spring Boot Microservices eCommerce Project Masterclass
    Visit Udemy

    Java Spring Boot Microservices eCommerce Project Mastercla

    JavaSpring Boot