1、Java Fundamentals: Deep understanding of Java Concurrency (JUC), familiar with various locking mechanisms, thread pool tuning, and the Java Memory Model (JMM).

2、JVM: Proficient in low-level memory allocation, class loading processes, garbage collectors (GC), and JVM parameter optimization.

3、Database: In-depth knowledge of MySQL index optimization, execution plan analysis, and transaction isolation levels; experienced in Clickhouse storage engines and query performance tuning for large-scale data.

4、Open Source Frameworks: Skilled in Spring Cloud microservices architecture, including Gateways, Registry, and Configuration Centers.

5、AI Capabilities: Proficient in using Claude Code for development.

6、Linux: Familiar with basic Linux commands.

7、Development Tools: Expert in IDEA, SVN, Maven, and Git for build and version control.

8、Caching: Knowledgeable in Redis data structures and distributed locks.

9、Elasticsearch: Experienced with Elasticsearch, Kibana, and writing common DSL queries.

10、Frontend: Basic understanding of Web frontend technologies including HTML, CSS, JavaScript, jQuery, and Ajax.