Is it necessary to pursue M.Tech course after completion of B.Tech Biotechnology course to get good job???

It is not necessary but yes, it would be good to pursue M.Tech after B.Tech Biotechnology for good and high salaried job

It is better to qualify the Graduate Aptitude Test in Engineering (GATE) after B.Tech in Biotechnology to pursue Master of Engineering or Master of Technology courses as most of the institutes demand GATE score for admission.

Different higher studies options available after B.Tech in Biotechnology are given below.
Master of Engineering in Bio-informatics
Master of Engineering in Biotechnology
Master of Technology in Biotechnology
Master of Technology in Biotechnology and Bio-process Engineering
Master of Technology in Biotechnology and Biochemical Engineering
Master of Technology in Industrial Biotechnology
Post Graduate Diploma in Ethics and Biotechnology
Master of Philosophy in Biotechnology
Doctor of Philosophy in Bioinformatics
Doctor of Philosophy in Bioresources and Biotechnology
Doctor of Philosophy in Biotechnology