SRM is a renowned brand in the world of private universities. Now if you have options to join government universities then dont join SRM as it isint worth to leave government institutions for a private one.
However if you are at a point of no return then STM indeed is a good university with a lot of scope during placements.
Look, one thing people forget is that placement opportunity is something SRM can handle but getting a job is something you need to focus at yourself. SRM can be the stairs to success but you need to be the one who can take the opportunity and climb it.
CSE is a renowned course and im pretty sure you can get jobs through SRM