Will Allah reward me if I decline a job offer, extended through an intermediary, where it was claimed I possess skills I do not have, and I felt uneasy about it, out of a desire for lawful earnings?

The questioner is thanked for leaving the job due to not meeting its conditions. Indeed, obtaining a government sector job through intercession requires the person to be competent and not to cause injustice to anyone. However, in the private sector, there is no harm in intercession for someone who is qualified, even if they are less competent than others. The questioner's action is correct, and they will be rewarded for it.