hi,

see there is several career option after btech. first of all, you can try to get job in your own field, however if you are interested for IT , and programming, you may choose software engineering as profession, most of the service base companies bulk hires recent btech graduates in on o off campus both. now if you are inclined only towards your stream and if you are from core stream like ee, ece, or mechanical you may give gate exam , as many of psus hire through gate and there is option for mtech also.  but remember gate exam is quite tough and only 10% of candidates who appeared in exam are able to qualify the exam, so your preparation should be on that level, right now think which field you want to work and what is your future goal.