Dear Richard, We have done similar integration for a US based startup last year using QB,Freshbooks and Xero. I can show you the demonstration as well as code level detail.
Relevant Skills and Experience
Quickbooks,Freshbooks, Xero, Java/J2EE, .NET,PHP
We would prefer Java while integrating QuickBooks
Proposed Milestones
$990 USD - Estimates and detailed milestones will be given once detailed requirements are available.
Please provide the detailed requirements for the workorder/estimating application.