As you want to get the details of jobs in Railways for B.Tech Computer Science students so here is the information of the same for you:

Job Opportunities in Indian Railways after B.Tech CSE:
Indian Railways Traffic Service
Indian Railways Service of Signal Engineers
RPF Sub Inspector
Indian Railways Store Service
Indian Railways Service of Engineers
Indian Railways Account Service
Sr. Engineering
Junior engineer
RPF Sub-Inspectors
Jr.Executive
Sr.System Analyst
Sr.Engineer
Stenographer
Section Research Engineer.
Section Engineer.
Junior Research Engineer-I

Selection process:
Written test
Interview