Process optimization using evoluationary algorithims in scala

Hi all ,

I aim at doing precriptive analysis , I already have a good machine learning model at hand and I aim at utilizing some optimization to find appropriate feature values for a particular target .

Since the data is huge , I am using scala with spark for this whole process .
Any suggestions on the same would be highly appreciated .

if anyone has any idea about how to use basin hopping optimization to find appropriate parameter value for a function which is basically a machine learning model , it will be great !!

Thanks in advance