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1. sportsbook sportsbook Public

   Sports betting backend with secure authentication, financial ledger, risk management, and anti-fraud features. Java 21, Spring Boot, PostgreSQL, Redis.

   Java

2. demo-bank demo-bank Public

   Java 21 banking REST API: Spring Security, JWT rotation, PostgreSQL, atomic transfers and regression tests

   Java

3. alex-kov-island alex-kov-island Public

   Multithreaded ecosystem simulator demonstrating Java 21 Virtual Threads, GoF/GRASP design patterns, concurrency, and performance optimization

   Java 1

4. online-book-store online-book-store Public

   Online bookstore REST API with book catalog, shopping cart, order management, and JWT authentication. Java, Spring Boot, MySQL, Docker

   Java

5. langkraft langkraft Public

   German language learning platform focused on immersive listening, YouTube content, and contextual vocabulary. Kotlin Multiplatform, Compose, Ktor, SQLDelight

   Kotlin 1

6. YtdlpJava YtdlpJava Public

   Java CLI tool for downloading YouTube videos, extracting audio and subtitles, generating screenshots, and processing playlists using yt-dlp and FFmpeg

   Java 1