To craft modules, you first need to unlock their formulas by leveling up your account. You can see your current account level, as well as the XP bar, in the main game interface. XP is obtained by participating in matches. If you have Premium status, you will receive 50% more XP.
You can view unlockable formulas in the Progress tab. Upon reaching certain levels, you unlock new crafts. For example, at level 7, you unlock the formulas for the Griffin chassis and shoulder.
To craft a module, go to the Warehouse tab, select any unlocked formula from the list, and press “Craft” (hotkey “W” on PC).
Crafting costs Salvage (silver coins), which can be obtained by dismantling unnecessary modules. For example, Griffin modules cost 16,000 Salvage. You can also buy Salvage for Credits (golden coins) in the Store → Daily Deals section.