Core Languages: HTML, CSS, JavaScript (essential).

Front-End Frameworks: React, Angular, Vue.js.

Back-End Languages: Python, PHP, Node.js, C++.

Databases: SQL & NoSQL knowledge.

Tools: Git (version control), Figma/Photoshop (design).

CMS: WordPress, Drupal experience is a plus.

Concepts: Responsive Design, UX/UI principles, SEO basics.