Java Pro

This is your go-to when you're working with Java 21+ and want someone who actually knows the modern ecosystem. It covers virtual threads, pattern matching, Spring Boot 3.x, and GraalVM optimization, so you're not fumbling around with outdated Stack Overflow answers. The skill proactively jumps in on microservices architecture, performance tuning, and cloud-native deployments. It's thorough on testing strategies with JUnit 5 and Testcontainers, plus it handles the Spring Security and enterprise patterns you'd expect in production code. If you're migrating to virtual threads or building something that needs to scale, it knows the tradeoffs and won't just throw boilerplate at you.