Develop a WordPress Plugin to verify Email Addresses at Checkout via API

We need a skilled WordPress Developer to develop a simple WordPress Plugin that can verify the Email Address at Checkout for Easy Digital Downloads and WooCommerce WordPress Webstores by using the API Service of EmailListVerify https://www.emaillistverify.com/.

Please put the keyword "SPOTLESS" in the headline of your bid so that we know you read this project description carefully. Bids without this keyword will not be considered.

Requirements:
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- Implement Email Validation at Checkout by using the API of EmailListVerify
- Needs to work for both Shop Systems: Easy Digital Downloads and WooCommerce
- Plugin will need to be developed using a specified Plugin Boilerplate Template
- The Source Code needs to be clean, readable, and fully comply with WordPress Coding Standards https://developer.wordpress.org/coding-standards/wordpress-coding-standards/
- Source Code needs to be uploaded on Github Repo and will need to pass a thorough review by our Lead Developer
- The Project needs to be completed within 5-7 days. (5 Days Draft, 7 Days Testing Completed)
- This Project is not Suitable for an Agency, it will only be awarded to a Skilled Independent Freelancer

If you are interested, kindly provide:
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1) Credentials that you have developed WordPress Plugins before
2) Explain how you can prevent possible Plugin Conflicts with other Plugins
3) Confirmation that you are familiar with WooCommerce and/or Easy Digital Downloads Webstores
4) Confirmation that you are familiar with Github
5) Confirmation that you are capable of setting up your own Easy Digital Download and WooCommerce Store to test your plugin
6) Confirmation that the Source Code to be developed will fully comply with WordPress Coding Standards