I am currently using setmore as our appoitment and scheduling tool for my massage business. I can export the customer list to constant contact, but I wish I could have a developer to make a API that can automatically synch the two list together. Not only that i would also like to create segments in constant contacts for customers coming in from the last week or month. Please let me know if someone out there can help me with this. Currently setmore is integrated with mailchimp.
The Constant Contact Marketplace has a listing for Constant Contact-certified software developers that you can check out here. You can reach out directly to the developers listed on this page who seem to be a good fit for you.