Hello aspirant,
With 20903 rank it is quite difficult for you to get cse in  academy of technology as in 2018 the cut for cse branch in last rounds of counselling was around 18k whereas in 2017 it was around 23k, so it changes every year, as your rank is close to the cut off ranks you might get cse there, apart from cse you can get other branches like IT as well.
Now coming to placements,
In terms of placement this college has been accredited with Tata consultancy services, capgemini,tech mahindra and wipro for campus placements. The annual average package is around  3.18-3.52 lakhs per annum.
Hope it helps