I'm going through Eat3D's UDK Modular Masterclass with Tor Frick.
So far it's been simple enough, but now he's on to vertex painting and making a material using constant bias scale nodes, Lerp nodes, etc. and ffs I hate this stuff.
I use substance designer for node based texturing, but UDK and UE4 are just too complex for me.
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However, regarding your question, I think it depends on the scale of the team. If, like Obscura mentioned, there's a TA on board that person will likely build a material library for you to use (and probably do several other things as well). But if you're one of the few artists around you might be expected to do everything needed for the final product.
Learning shaders/materials will be a great asset to your skillset. It's worth spending time on, and I have no doubt you'll end up enjoying it