Hi there,
hope you are doing well.
With 14750 rank in JEE Mains, there are still few chances available to you for CSE in NITs like:-
1) NIT Patna
2) NIT Puducherry
3) NIT Silchar
4) IIIT Kancheepuram
5) IIIT Jabalpur

But, if your main motive is to get a good placement and not to be research-oriented, then it would be better to pursue CSE from VIT Vellore and score good GPA in there, to get a good placement.
Hope it would help.
Thank You