Praise be to Allaah.
Allaah says (interpretation of the meaning):
“Help you one another in Al-Birr and At-Taqwa (virtue, righteousness and piety); but do not help one another in sin and transgression” [al-Maa’idah 5:2]. Your working in this institute is clearly helping them to continue engaging in riba, which is something that is forbidden not only in Islam but in all religious laws revealed to other Prophets. The Prophet (peace and blessings of Allaah be upon him) said: “Allaah has cursed the one who consumes riba, the one who gives riba, the one who writes it down and the one who witnesses it.” He said: “They are all the same.”(Narrated by Muslim).
So you have to look for a new job. The Prophet (peace and blessings of Allaah be upon him) said: “You never give up anything out of fear of Allaah, but Allaah will give you something better than that.”(Narrated by Ahmad).
And Allaah says (interpretation of the meaning):
“And whosoever fears Allaah and keeps his duty to Him, He will make a way for him to get out (from every difficulty). And He will provide him from (sources) he never could imagine. And whosoever puts his trust in Allaah, then He will suffice him.” [al-Talaaq 65:2-3]
And Allaah knows best.