Provide a clear example of a similar job you have done in the past.
I've recently done integration of Sendy (emailing software) and Zoho, through their API. You can find the project on my feedback page, it is one of recent.
Proposal:
Hello,
I'll be happy to help you with the project. Need more information about the data you work with and the environment, about architecture of your current system and workflow.
Thanks, Alex