I have gone through your requirement and analyzed that you want to resolve some issues that you are facing, For that you are looking for experienced developer who will be able to do task for you.
As your requirements are fully clear to me but I want to discuss with you about your project over chat so that
I have different specializations.:
1. Open Source CMS (Wordpress, Drupal, Angular, Joomla, Shopify, Magento)
2. MVC Framework (Laravel, CakePHP, Yii, Codeignter)
I have recently created these websites and providing support and maintenance on many of those applications.
I'd be happy to provide you with links so that you can review those before making a hiring decision.