Is there any vacancies for B.tech (C.S.E) freshers pls guide me anyone

No

Practice and make yourself thorough on basics and learn DSA to clear coding rounds. Join twitter and hang out with developer communities, you might get referral if you are soo good. If you are not getting any full time role. Just join as Intern and work. Even small startup would do. Start small and prepare for good companies meanwhile.

What u want

Don’t beg here just study