Thank you for posting this project on Freelancer. I am available, and I would be glad to work on it.
About me: I have a 17 years experience as a freelance Filemaker developer. I realized custom applications for small and medium companies to manage data from wide range of different activities. I realized several databases including the features you are looking for
I use to work alone, but in close contact with my client before a projects starts, during its development and after it is completed. My effort is to provide a clean and simple interface that let users concentrate on their 'real' work and not on figuring out how the software works. The applications that I realize are 'open' for the client, enabling future developments by anyone.
Please, ask any question you might have about me or my work
Best regards
Alessandro Barattieri