Railways

The jobs for IT engineers in railways are :-
1. Section Engineer.
2. Junior Engineer.
3. System Analyst.
4. IT Officer.
5. IT Executive.
6. Technical Executive.
7. Technical Assistant,
8. Assistant Controller Officer.
9. IT Assistant Manager.
10. Project Manager.
11. Rail Engineer.
12. Senior System

RRB ALP CBT 1 comprises subjects such as mathematics, general intelligence and reasoning, general Science, general awareness and Current Affairs. The CBT 2 comprises subjects such as mathematics, general intelligence and reasoning, general Science and engineering, general awareness and Current Affai

For applying to RRB NTPC candidates must have passed class 12th for undergraduate posts and for graduate level posts, candidates must have passed graduation. For Assistant Loco Pilot, candidates must have passed class 10th / SSLC Plus ITI / Course Completed ACT Apprentices or Diploma / Degree in Eng

That is a splendid profile for good colleges. It is very hard for Iims to reject the 9-9 profiles (90% in 10th 90%in 12th). Adding to that is your work ex which is a major profile decider. Also, you have a decent score in CAT so you can expect good calls.

After completion of B.Sc. You can apply for Railway exam through SCRA (Special Class Railway Apprentice) conducted by UPSC every year to join as technical officers in the Mechanical Department of Indian Railway. Further more, the posts you can apply are:
Station Master
Assistant Station master
Signal C

Yes you will face problem when your documents will get verified.