Jobwork in interstate branch

Yes, it is possible. As per sec. 143 of CGST act.

The principal shall not supply the goods from the place of business of a job worker in accordance with the provisions of this clause unless the said principal declares the place of business of the job-worker as his additional place of business except in a case— (i) where the job worker is registered under section 25; or (ii) where the principal is engaged in the supply of such goods as may be notified by the Commissioner.