integrate with squarespace

I am looking to hire a Freelancer to integrate the Squarespace platform with some of my existing services. The specific functionality I need to integrate are email data field from form box for subscribers. I have already set up an email marketing service with MailChimp so I am looking for someone to seamlessly integrate them. The time frame for the integration needs to be as soon as possible. If you are available and able to meet my needs, I would appreciate it if you could provide a quote and further discuss the project details. Thank you!