macOS App Swift Developer for In-App Purchases

I'm in need of a skilled Swift developer with experience in implementing in-app purchases in macOS applications. The application is already built and functioning, but I require assistance in adding a subscription-based in-app purchase feature.

Key Requirements:
- Have access to the Apple Developer Program and experience in submitting in-app purchase features to the Apple Store
- Proficient in Swift, as the application is built using this language
- Ability to implement subscription-based in-app purchases seamlessly
- Experience in the development of macOS applications and complying with Apple Store guidelines

Your responsibilities will include:
- Implementing the subscription-based in-app purchase into the existing macOS application
- Ensuring the in-app purchase feature is fully operational and integrated
- Assisting with the submission and approval process on the Apple Store

Note: The subscription content is already prepared, so the focus will primarily be on the technical implementation of the in-app purchase feature. Your expertise and previous experience in this area are crucial.

Looking forward to hearing from you.