QuickBooks API, full stack developer

Need a developer that is well-versed with QuickBooks API. Need to develop a program for internal use. Need a frontend and backend developer ( full stack). You can use AI to write and review code. I need fast development ( but high quality also). Provide - 1. Your estimated fees ( full time per month). 2. Tech that you will use 3. Your experience in QB APIs 4. Development timeline?