De or het softwareoplossing?

The correct Dutch article is:

de softwareoplossing

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

How to use softwareoplossing

the softwareoplossingde softwareoplossing
this softwareoplossingdeze softwareoplossing
that softwareoplossingdie softwareoplossing
our softwareoplossingonze softwareoplossing
your softwareoplossingjouw softwareoplossing
every softwareoplossingelke softwareoplossing
which softwareoplossing?welke softwareoplossing?
a big softwareoplossing / the big softwareoplossingeen grote softwareoplossing, de grote softwareoplossing