Looking for a minecraft dev to code a modpack if I provide the Modifications?

A friend recently told me that the folder of minecraft mods that I had created was not a mod pack, but a 'mashup.' He explained to me that mod packs require the mods involved to have their code altered in order to make them interact with eachother, for example, coding a mod that adds new weapons and a mod that adds new resources to create crafting recipes unique to that modpack. An example of this that comes to mind is from RLCraft, where the mods Thaumcraft and Spartan shields are coded to add shields made from resources from Thaumcraft. For the time being I just want information on this topic from somebody who knows about it, as I know nothing more than downloading mods and putting them into a folder.

I look forward to further correspondence.
Thank you.