I need a skilled PHP developer proficient in Yii2 and AngularJs to customize my standalone app. Key Requirements: - Primary focus on altering the app's color and theme to a light and minimalistic style. - Incorporating some of my specific color preferences. - Making the app mobile responsive. - Adjusting the API endpoints as per my requirements. - Implementing user authentication and authorization mechanisms. - Integrating security enhancements to protect against common vulnerabilities. - Identifying and fixing any existing bugs in the app. The ideal freelancer for this project should have: - Extensive experience in PHP, Yii2, and AngularJs. - A strong understanding of mobile responsive design. - A keen eye for design and attention to detail. - Ability to work with specific color preferences to create a light and minimalistic theme. The project should be completed within 1 month. Please implement JWT for user authentication. Preferred method of communication is via chat. Freelancer's input will be required to create the new color scheme and theme. Please implement Admin and User roles with specific permissions. Please implement OAuth2 for user authentication. Ensure the mobile responsive design is compatible with both iOS and Android devices. Additionally, prioritize optimizing the app's performance for better speed and efficiency. Please follow my specific design guidelines or references for the light and minimalistic style. Please implement email notifications.