eXcelisys definitely has developers with eXperience in FileMaker. That eXperience has helped turn around our solution.
We came to eXcelisys about two years ago after struggling with another FileMaker developer. We had poured money into getting a solution that did not consistently work and continually frustrated our business users. Meanwhile, our company made an acquisition that required business changes and software changes. eXcelisys was able to dive right in and make the necessary changes so we could begin integrating the newly acquired company into our solution and business process.
Over time, we were able to make great strides with the reliability of the solution as eXcelisys completely redesigned and rebuilt the synchronization technology, allowing our iOS devices to operate in remote locations with no cellular signal. We could cache data and send when a connection was reestablished. This improved our data capture and also eliminated frequent file corruption issues.
eXcelisys also made a key improvement which automatically deployed updates to our remote devices (instead of manually reinstalling files). This saves both time and hassle for our remote employees.
My only suggestion to them (which I have voiced) is in their billing. In the past, we have purchased a block of hours at a discounted rate. This is a good value if you're using a large number of hours. However, it can be very difficult to reconcile what has been consumed to slight delays in approving time and billing. This often left us consuming more hours than we had purchased and feeling like we were burning through hours faster than if we were on a straight hourly billing model. Despite this, I've been happy overall with eXcelisys.