Built and Manage WordPress - WooCommerce or OpenCart Websites

We need a highly skilled person, for a long-term partnership, with the ability to manage WordPress(mostly), OpenCart, Magento, and Custom made websites. We mostly build and manage WordPress websites & e-shops. We have multiple websites(clients) and there are a lot of tasks needed to be done on a daily basis, from daily tasks like updates debugging, etc to building sites from scratch. Examples of tasks we need are the following:

1. Install a theme and replace default images and texts
2. Import woocommerce products and massively edit them
3. Customize plugin or core theme files using php
4. Design improvement using css
5. Ability to find the correct plugin to add the desired feature
6. Manage WordPress, OpenCart, Magento and Custom made websites, import-export tools
7. Taking care of Google Speed
8. SEO on-site knowledge is a must

Knowledge of hosting and maintaining servers will be a plus.

It is important to have a good sense of modern design trends!

Feel free to bid on your favorite hourly rate if you feel confident that you meet all job requirements.

Thanks!