Does this skill support older Java versions?

While specifically optimized for Java 21 LTS and Spring Boot 3.3 features, the skill applies standard Java and Spring Framework practices compatible with most modern enterprise environments.

How does it help with high-concurrency applications?

It provides implementation patterns for Java 21's Virtual Threads (Project Loom) and Structured Concurrency to handle massive parallel tasks with minimal resource overhead.

Can it assist with build tool configuration?

Yes, it includes optimized templates and troubleshooting for Maven 3.9 and Gradle 8.5, including Kotlin DSL configurations.

Does it provide help with database performance?

It offers advanced JPA/Hibernate patterns including entity mapping, JOIN FETCH optimization, and repository query design to prevent common issues like the N+1 problem.

Java 21 & Spring Boot Specialist

Name: Java 21 & Spring Boot Specialist
Author: zellycloud

byzellycloud

API Development

Accelerates enterprise Java development using modern features like Virtual Threads, Spring Boot 3.3, and Pattern Matching.

About

This Claude Code skill transforms Claude into a senior Java architect specializing in the Java 21 LTS and Spring Boot 3.3 ecosystems. It provides expert-level guidance on implementing enterprise-grade patterns, reactive programming with WebFlux, Spring Security 6, and modern Java features such as record patterns and sealed classes. Whether you are building high-performance microservices from scratch, optimizing concurrent operations with Virtual Threads (Project Loom), or setting up robust integration tests with TestContainers, this skill ensures your codebase follows industry best practices and production-ready standards.

Key Features

Java 21 LTS optimization including Virtual Threads and Structured Concurrency
Spring Boot 3.3 implementation for REST APIs and reactive services
Enterprise persistence patterns using JPA, Hibernate 7, and custom repositories
Advanced security configurations with Spring Security 6, JWT, and OAuth2
Testing infrastructure setup with JUnit 5, Mockito, and TestContainers
0 GitHub stars

Use Cases

Building high-concurrency microservices utilizing Project Loom virtual threads
Modernizing legacy Java applications to Java 21 LTS and Spring Boot 3.3
Implementing secure, scalable RESTful APIs with complex database relationships

About

Key Features

Java 21 LTS optimization including Virtual Threads and Structured Concurrency
Spring Boot 3.3 implementation for REST APIs and reactive services
Enterprise persistence patterns using JPA, Hibernate 7, and custom repositories
Advanced security configurations with Spring Security 6, JWT, and OAuth2
Testing infrastructure setup with JUnit 5, Mockito, and TestContainers
0 GitHub stars

Use Cases

Building high-concurrency microservices utilizing Project Loom virtual threads
Modernizing legacy Java applications to Java 21 LTS and Spring Boot 3.3
Implementing secure, scalable RESTful APIs with complex database relationships