Alternative expressions to describe "rich experience" [closed]

I use "rich experience" often, but would like to use more precise expression.
i.e

I have rich experience in mobile application development and have built more than 8 iOS apps for the last 3 years.

Not sure whether it is appropriate, and please let me know better solution if any.

Thanks in advance.

Solution 1:

Rich experience in technology parlance is reserved to User Interfaces and general aesthetic of software/hardware

Something on the lines of

The Facebook application gives a rich experience to the end user

If you want to denote that you have experience in some field. You may use relevant, skilled or as previously answered : extensive

I have seen the relevant word used on Curriculum Vitaes

Solution 2:

I have rich experience in mobile application development and have built more than 8 iOS apps for the last 3 years.

Yes, "rich experience" is not used a great deal in this context.

I have extensive experience in mobile application development

Is more common. As a single word to replace "rich" , "extensive" seems to work well.