Is lending money to a colleague to pay as a bribe for a job forbidden (haram), and what should I do after having done so?

Bribery is one of the major sins, and its perpetrator deserves to be cursed and expelled from God's mercy. However, if a person has a right that he cannot obtain except through bribery, then it is permissible for him to give it, while it remains forbidden for the recipient. Therefore, if your colleague is qualified for the job, and did not advance over someone more competent than him due to his payment of the bribe, then it is permissible for you to assist him with the required amount. This falls under the category of helping a person attain his right.