The word experienced in the model you offered is an adjective, it does not require a modifier such as in or of.
In the example you have given, system development, the word ,experienced, would not be used because you are not system development.
Possible ways of ways of using the word experienced in your example are:
experienced system developer - which means you have experience in developing systems. The word experience tells the reader what level of system developer you are at the moment, it modifies the words system developer.
If you use the word experience (no d), it is now able to be used as a noun.
The noun usage might be something like, "I have experience in system development." as suggested in another answer. In this case, experience is a thing (noun) you have, and system development describes/modifies the thing you have.
As a verb or action of experiencing it might be something like, "I am experiencing some frustration with writing my cover letter for the system developer position.." In this case, experiencing is the thing you are doing.
Hope this answer helped you a little bit. I am happy to look at whatever you are working on and offer guidance.