hii ,

Its not that the acadamics of iits or nits are very great but in these colleges you get a lot of oppotunities , because every one believes that it has the best minds in the country which to some extend is true .

but , in now days specially in tech field companies do not dicriminates , so it does not you just need to work hard and you can get the oppoutunities .

BEST OF LUCK

for best colleges through jee rank use the college predictor - https://engineering.careers360.com/jee-main-college-predictor?utm_source=qna&utm_medium=jee_cp