Ref. No. 1054/41-239
In the name of Allah the most Gracious the most Merciful
The answer to your question is as follows:
giving or taking bribe is Haram in Islamic Shariah. If he is qualified and eligible for the job, then his job is fine and salary is halal. And if he is not eligible and he got the job unjustly just owing to bribe, then it is not halal.
And Allah knows best
Darul Ifta
Darul Uloom Waqf Deoband