Strong knowledge of PHP web frameworks such as Laravel, Yii, etc depending on your technology stackUnderstanding the fully synchronous behavior of PHPUnderstanding of MVC design patternsBasic understanding of front-end technologies, such as JavaScript, HTML5, and CSS3Knowledge of object oriented PHP programmingUnderstanding accessibility and security compliance Depending on the specific projectStrong knowledge of the common PHP or web server exploits and their solutionsUnderstanding fundamental design principles behind a scalable applicationUser authentication and authorization between multiple systems, servers, and environmentsIntegration of multiple data sources and databases into one systemFamiliarity with limitations of PHP as a platform and its workarounds