Core Java (Java 11+) and OOP principles Spring Boot / Spring MVC / Spring Data JPA RESTful API design and development Hibernate/JPA for ORM Build tools: Maven or Gradle Application servers / containerization basics (Tomcat, Docker) Unit testing: JUnit, Mockito
React.js (Hooks, Context API, component lifecycle) AI-assisted coding tools hands-on experience with Claude Code, GitHub Copilot, or similar (using them productively, not just awareness) - any 1 LLM API integration — calling LLM APIs (Anthropic, OpenAI, Azure OpenAI) from application code, handling responses, streaming, and error cases - any 1