Strong proficiency in React.js and its core principles.
Experience with modern front-end technologies (HTML5, CSS3, JavaScript ES6+).
Experience with state management libraries like Redux or Context API.
Familiarity with front-end build tools (Webpack, Babel, etc.) and version control systems (Git).
Strong experience with Java and frameworks like Spring Boot, Spring MVC, Spring Data, and Hibernate.
Experience in developing RESTful APIs and working with JSON and other data formats.