Wordpress Woocommerce Website Changes

I'm looking for an experienced WordPress developer to modify my existing website. The project involves:

- Design Changes: Revamp the current design to improve aesthetics and user experience.
- Functionality Changes: Modify existing features and possibly add new ones to enhance site performance.
- Content Updates: Revise current content for accuracy and relevance.
- Extension Installation: Install necessary plugins/extensions to add desired functionalities.
- Theme Update: Upgrade the current theme to the latest version without compromising the site’s integrity.

Ideal skills and experience:
- Proficiency in WordPress
- Strong design skills (preferably with a portfolio)
- Experience with theme and plugin installation and modification
- Familiarity with SEO best practices
- Ability to ensure mobile responsiveness and cross-browser compatibility

Please provide examples of previous work and an estimated timeline for completion.