De or het stage-ervaring?

The correct Dutch article is:

de stage-ervaring

Rule Words ending in -ing: almost always de. See the rule

How to use stage-ervaring

the stage-ervaringde stage-ervaring
this stage-ervaringdeze stage-ervaring
that stage-ervaringdie stage-ervaring
our stage-ervaringonze stage-ervaring
your stage-ervaringjouw stage-ervaring
every stage-ervaringelke stage-ervaring
which stage-ervaring?welke stage-ervaring?
a big stage-ervaring / the big stage-ervaringeen grote stage-ervaring, de grote stage-ervaring