Developing Software for Banking Account

Assalamu alaikum wa Rahmatullah

I have a small IT startup company and I am asked to develop a mobile app by which user can open account with the Bank. Note that the bank is operating in regular/traditional interest based system and the user has option to prohibit interest accumulation to his account.

My question is: will the income with this kind of software development be halal?

Jajak-Allahu Khairan.


May Allah bless you.
What would this software be used for exactly other than opening bank accounts?

Kind regards.