プロジェクト・事例研究
実践プロジェクト:決済ゲートウェイのマイクロサービス、フルスタックアプリ、Djangoバックエンド、RAGシステムなど。
J.P. Morgan Personal Investing — BackEnd Engineer Mock Interview Pack
Format: 60minute pair programming on HackerRank IDE, 1–2 businesslogic problems, Java/Kotlin preferred. Team context: Stockmarket broker Personal Investing platform. Goal: Translate spoken business rules into clean, test
記事を読む →Payment Gateway Q&A
What it is: ArgumentCaptor is a Mockito utility that captures the actual argument passed to a mocked method during execution, so you can inspect it afterwards.
記事を読む →Payment Gateway Challenge
This project is a Spring Boot application that implements a simple payment gateway based on the requirements from the challenge:
記事を読む →How to fulfill everything described in README.md
This document maps each commitment in the project README.md to concrete actions and suggested code. The upstream interview template is paymentgatewaychallengejavahttps://github.com/ckorecruitment/paymentgatewaychallengej
記事を読む →Microservices Teaching Guide — Payment Gateway
A complete, handson course for refactoring a Spring Boot monolith into a productiongrade microservices system, and deploying it to AWS. Source monolith: ../paymentgatewaychallengejava Target system: this folder paymentga
記事を読む →Payment Gateway — Microservices Edition
A microservices reimagining of the paymentgatewaychallengejava../paymentgatewaychallengejava Spring Boot monolith.
記事を読む →Architecture Decision Records ADRs
ADRs document why we made a decision, not just what we did. We use the Michael Nygard formathttps://cognitect.com/blog/2011/11/15/documentingarchitecturedecisions. Each ADR has a status: Proposed, Accepted, Superseded.
記事を読む →AWS Deployment — Step by Step
Companion to ../MICROSERVICESTEACHINGGUIDE.md../MICROSERVICESTEACHINGGUIDE.md §15. Goal: take the eight microservices in this repository from docker compose up to a productiongrade deployment on AWS using ECS Fargate, RD
記事を読む →CI/CD with GitHub Actions
Companion to ../MICROSERVICESTEACHINGGUIDE.md../MICROSERVICESTEACHINGGUIDE.md §16.
記事を読む →Observability
Companion to ../MICROSERVICESTEACHINGGUIDE.md../MICROSERVICESTEACHINGGUIDE.md §12. Distributed systems are only as good as your ability to understand them. This document covers logs, metrics, traces, dashboards, and aler
記事を読む →Terraform — Payment Gateway Microservices on AWS
Reference IaC for the AWS deployment described in ../../docs/02awsdeployment.md../../docs/02awsdeployment.md. Status: skeleton. It compiles terraform validate and demonstrates the module structure. Before applying it to
記事を読む →Payment Gateway Design Documentation
This project implements a Payment Gateway API that allows merchants to process card payments and retrieve payment details. The gateway validates incoming payment requests, forwards valid payments to an acquiring bank sim
記事を読む →Florence Hotel Website Flask
This project is a Flask implementation of the Florence hotel frontend based on florencehote.html.
記事を読む →Run and deploy your AI Studio app
This contains everything you need to run your app locally.
記事を読む →Deploy PawMatch to AWS EC2 Ubuntu
This guide covers syncing the Next.js frontend and Flask backend to an EC2 instance, running them under systemd, and using nginx with existing Let’s Encrypt certs so HTTPS on port 443 serves the site while the app listen
記事を読む →PawMatch Backend API
A Flaskbased backend API for the PawMatch cat matching and health analysis platform.
記事を読む →or
This is a Next.jshttps://nextjs.org project bootstrapped with createnextapphttps://nextjs.org/docs/app/apireference/cli/createnextapp.
記事を読む →Password CRUD Demo Application
A demonstration web application for password CRUD operations with plain text storage demo purposes only.
記事を読む →Software Requirements Specification SRS
Product: Password CRUD Next.js + Express.js + Prisma + SQLite – Plain Password Demo Version: 1.1 Date: 29Aug2025 Author: ChatGPT “Cathy”
記事を読む →Android Development Exercises
1. Start Small: Begin with simple modifications 2. Read Documentation: Use official Android docs 3. Experiment: Try breaking things and fixing them 4. Ask Questions: Don't hesitate to seek help 5. Practice Regularly: Con
記事を読む →Android App Development with Kotlin Learning Guide
Explanation: lateinit var: Declares a variable that will be initialized later common in Android var: Mutable variable can be changed val: Immutable variable cannot be changed after initialization
記事を読む →Android Development Learning Path
Week 1 Deliverables: Working Android Studio setup Basic Kotlin knowledge Understanding of Android project structure First modifications to the Blackjack app
記事を読む →Blackjack (21) Overview
Blackjack 21 Overview Blackjack, also known as 21, is a popular card game often played in casinos. The goal is to have a hand value close to 21 without going over.
記事を読む →Kotlin Syntax Quick Reference
// Mutable variables var count = 0 // Can be changed var message: String? = null // Nullable String
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