Expert in SDK java with intuit integration - Quickbook Payroll

Hi

I need a person with an expert who has done oauth2.0 integration of intuit JAVA SDK in Lotus Notes. I think we are using SDK 1.7.

developer.intuit[com]/app/developer/qbo/docs/develop/sdks-and-samples-collections/java

Question 1: have you done any integration with intuit payroll.
Question 2. : have you got employee vacation balances from QuickBooks system
question 3: have you retrieve the values for the employee timesheet from QuickBooks payroll
Question 4: Have you worked with the Lotus notes server - designer before?

We are having a tough time connecting and get it working..