Creating a homemade Integration with your database

Pass donation data to your server

Every time new donation happens the donationComplete even fires.  Assuming you have jQuery installed on frontend  and  donations.php on your backend, your code can be something like this:

<script>
  FundraiseUp.on('donationComplete', function(details) {
    $.ajax({
       type: "POST",
       url: "https://helping-hand.org/donations.php",
       data: details
     });
  });
</script>

Process submission on your server

Now you have donation data passed to your script ( assuming you are using PHP ), just continue to write it to your database using your ORM

// Takes raw data from the request
$json = file_get_contents('php://input');

// Converts it into a PHP object
$data = json_decode($json);

// Write data to your database
// .........