Hello!
I am ready to help you with your task! What kind of software do you need, desktop or web-based?
I am experienced developer of desktop applications as well as web-based CRMs using PHP+MySQL+jQuery+Bootstrap3+GoogleAPI with such functions as:
- Bookings keeping
- bills and invoice making
- managers accounts managing
- Google Drive files upload
- Gmail messages fetching
- reports, contracts and etc docs generating and etc...
I can send you screenshots of the system, I guess it's similar to what you need
You can also take a look at my portfolio.
Please do not hesitate to contact me via messenger!