Hey friend!

Yes you can directly go for jobs . It is not necessary to go for btech . Doing Mtech will make you more specialised in your field and increase job opportunities . But companies will be same for both btech and Mtech . So don't worry and focus on btech . Give Gate exam as it is also for PSU's (like DRDO , ISRO etc.)

To get best possible colleges on the basis of your rank , category and home state ; Kindly Click on the link given below:

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

All the best friend!