University degree (AEI/TEI) or Master's in Computer Science or equivalent. At least 2 years of work experience with PHP. Knowledge of JavaScript frameworks like ExtJS, React. Object-Oriented PHP programming experience. Familiarity with Web Service integrations (SOAP, JSON/XML, REST). Good knowledge of MySQL and NoSQL databases. Excellent knowledge of HTML5/CSS3/JQuery/AJAX. Understanding of accessibility and security compliance. Military obligations fulfilled (for Greek candidates).