A professional with extensive knowledge of accessibility and security compliance, skills for optimizing the application for speed and efficiency. Over 5 years in web development (full stack), from building separate features (front-end UI components, API, etc.) for complex web apps, to working on an entire application. Front End development skills: SPA development using the following framework\libraries: React.js, Express.js Front-end parts and automation of system elements’ behavior HTML/CSS skills Back End development skills: API layers development for any kind of web applications (including SPA and API services) with PHP and Node.js frameworks Application architecture development DB architecture development Data migration automation (between different CMS and systems) Covering API and separate app functional parts with Unit Tests (using PHPUnit and wrappers)