If you are wiling to go for Bank jobs after your BTech then you can obviously go for the examination qualifying which you get the banking jobs. Some of the famous examination for Bank services in India are enlisted below:

1. SBI PO
2. SBI CLERK
3. IBPS PO
4. IBPS CLERK

To know more about the examinations visit the link below:

https://competition.careers360.com/articles/sbi-po

https://competition.careers360.com/articles/sbi-clerk

https://competition.careers360.com/articles/ibps-po

https://competition.careers360.com/articles/ibps-clerk

Also there are banking courses which are offered by numerous colleges in India. TO know more about that visit the link below:

https://www.careers360.com/courses/banking-course

I hope this answer helps. All the very best for your future endeavors