Hey, i have found a way to speed the alignment/faction.
Aim to any of the character races, hold E to engage en conversation and dont release it, then spam left click until you get the "give a gift" (should be the first option) and leave the mouse pointing in that, then hold left click to give gift, keep spaming left click to end conversation, (you still holding E), you will engage un conversation againe and start spamming left click again. Reapeat, profit. I did it with every race, in the space stations and it take me like 5 minutes with each npc to get the highest level.
Trader missions its another thing, you actually have to complete mission to get a better rank.
Hope it helps.