Yes, for typical corporate development tasks which is the bulk of the tech job market. As long as they are reasonably seasoned vs what you need done and you don't throw them in to the deep end on day one. Every language has quirks and corner cases but after you've learned enough of them, the oddities don't tend to trip you up for very long. Learning the specific frameworks and business knowledge tends to be the lions share of the learning that needs to happen... takes longer but also not a big deal.
Realistically, the majority of developers spend their days doing rather mundane work with CRUD/data-munging probably being a good description for most of it (regardless of whether it's server/desktop/mobile/web) which isn't rocket science. Now if you need an expert to write a memory management system for language X on OS Y, that's a different story.
Realistically, the majority of developers spend their days doing rather mundane work with CRUD/data-munging probably being a good description for most of it (regardless of whether it's server/desktop/mobile/web) which isn't rocket science. Now if you need an expert to write a memory management system for language X on OS Y, that's a different story.