Answer

In the Name of Allah, Most Gracious, Most Merciful. 

All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.

---

In this fatwa:

There is nothing wrong with installing doors for non-Islamic banks.

---

Answering your question, the General Iftaa’ Department in Jordan, states the following:

Works that facilitate usurious transactions in non-Islamic banks are forbidden to be carried out, and since your job in the above company has nothing to do with riba (interest), then it is permissible.

Almighty Allah knows best.

Source: https://www.aliftaa.jo/Question2En.aspx?QuestionId=3348