Custom Fields Integration in Magento 2

I need two text-based custom fields added to the Shipped Items and Backorder Items grids in my Magento 2 store. These fields should be capable of performing summation or counting operations. Furthermore, I want all fields on the report to be exportable to a CSV file.

Ideal skills for this job include:
- Extensive experience with Magento 2
- Proficiency in PHP and MySQL
- Familiarity with CSV file handling
- Knowledge of custom field creation and manipulation
- Experience with condition-based programming