Greetings..!
I am expert in Magento migration and would like to work on your project as well. I can easily migrate your site from 1.9 to Magento 2.3. With the Magento2, I have completed a lot of projects where I have customized the Theme, Developed Themes from Scratch, developed Extensions and done lot of customization within Magneto 2 Platform. Also, I have developed Magento 2 Extensions.
I have migrated and upgraded Magento stores to the newest versions. Also, I can remove the unrequired extensions present in the site and integrate the required ones into the site. All existing data will be migrated as well. Also, I can develop the custom extensions, if needed.
For more reference, you can check my review. So, that you can better know about my expertise. Thanks!
Best Wishes,
Mithu